Question 1: Palette 1/173

Allen MCQ

Mendeleev periodic table is based on :-

A

Atomic number

B

Increasing order of number of protons

C

Electronic configuration

D

None of the above

Question 2: Palette 2/173

Allen MCQ

Which of the following sets of elements follows Newland's octave rule:-

A

Be, Mg, Ca

B

Na, K, Rb

C

F, Cl, Br

D

B, Al, Ga

Question 3: Palette 3/173

Allen MCQ

The places that were left empty by Mendeleev were, for:-

A

Aluminium and silicon

B

Gallium and germanium

C

Arsenic and antimony

D

Molybdenum and tungsten

Question 4: Palette 4/173

Allen MCQ

Which is not anomalous pair of elements in the Medeleev's periodic table:-

A

Ar and K

B

Co and Ni

C

Te and I

D

Al and Si

Question 5: Palette 5/173

Allen MCQ

The law of triads is applicable to :-

A

Os, Ir, Pt

B

Ca, Sr, Ba

C

Fe, Co, Ni

D

Ru, Rh, Pt

Question 6: Palette 6/173

Allen MCQ

Elements which occupied position in the lother meyer curve, on the peaks, were :-

A

Alkali metals

B

Highly electro positive elements

C

Elements having large atomic volume

D

All

Question 7: Palette 7/173

Allen MCQ

In a period, the elements are arranged in :-

A

Decreasing order of nuclear charge

B

Decreasing order of No. of electrons

C

Increasing order of nuclear charge

D

In order of same nuclear charge CPT010

Question 8: Palette 8/173

Allen MCQ

Which of the following statement is wrong:

A

$4^{\text{th}}$ period contains 18 elements

B

$3^{\text{rd}}$ period contains 18 elements

C

$1^{\text{st}}$ period contains two gaseous elements

D

In p-block, metal, non-metal and metalloids are present

Question 9: Palette 9/173

Allen MCQ

The discovery of which of the following group of elements gave a death blow to the Newlands Law:-

A

Inert gases

B

Alkali metals

C

Transuranic element

D

Halogens

Question 10: Palette 10/173

Allen MCQ

In a group, reason of periodicity is :-

A

Same number of electrons in their atom

B

Same ionisation potential

C

Same valence shell electronic configuration

D

Electrons present in the same subshells

Question 11: Palette 11/173

Allen MCQ

Which of the following element was absent in the Mendeleev's periodic table :-

A

Tc

B

Si

C

B

D

F

Question 12: Palette 12/173

Allen MCQ

Which statement is wrong for the long form of periodic table :-

A

Number of periods are 7 and groups 18

B

No. of valence shell electrons in a period are same

C

$3^{rd}$ group contains 32 elements

D

Lanthanides and actinides are placed in same group

Question 13: Palette 13/173

Allen MCQ

The elements which are cited as an example to prove the validity of mendeleev's periodic law are

A

H, He

B

Ga, Sc

C

Co, Ni

D

Zr, Hf

Question 14: Palette 14/173

Allen MCQ

According to the latest IUPAC recommendation the inert gases are in :-

A

Zero group

B

Eighth group

C

Eighteenth group

D

All are correct

Question 15: Palette 15/173

Allen MCQ

Elements having atomic number 112 is named as:-

A

Roentgenium

B

Copernicium

C

Flerovium

D

Livermorium

Question 16: Palette 16/173

Allen MCQ

Which of the following set of elements belongs to same period :-

A

Zn, Cd, Hg

B

Fr, Ra, U

C

K, Ca, Ag

D

None

Question 17: Palette 17/173

Allen MCQ

The element with atomic number Z = 115 will be placed in :-

A

$7^{th}$ period, IA group

B

$8^{th}$ period, IVA group

C

$7^{th}$ period, VA group

D

$6^{th}$ period, VB group

Question 18: Palette 18/173

Allen MCQ

The number of elements in 5th and 6th period of periodic table are respectively :-

A

8, 18

B

18, 18

C

18, 32

D

18, 28

Question 19: Palette 19/173

Allen MCQ

The eighteenth element of periodic table resembles with :-

A

Eleventh element

B

Second element

C

Tenth element

D

Second and tenth both element

Question 20: Palette 20/173

Allen MCQ

The IUPAC name of the element which is placed after $Db_{105}$ is the periodic table, will be:-

A

Un nil pentium

B

Un un nilium

C

Un nil hexium

D

Un nil quadium

Question 21: Palette 21/173

Allen MCQ

The element with atomic number Z=118 will be :-

A

Noble gas

B

Transition metal

C

Alkali metal

D

Alkaline earth metal

Question 22: Palette 22/173

Allen MCQ

The atom having the valence shell electronic configuration $4s^{2}$ $4p^{2}$ would be in:

A

Group II A and period 3

B

Group II B and period 4

C

Group IV A and period 4

D

Group IV A and period 3

Question 23: Palette 23/173

Allen MCQ

In the periodic table, where are non-metals located

A

Between groups II A and III A

B

On the lower left hand side

C

On the upper left hand side

D

On the upper right hand side

Question 24: Palette 24/173

Allen MCQ

Elements with similar chemical properties :-

A

Occur only within the same period

B

Have identical atomic mass (weight)

C

Have identical number of neutrons

D

Have the same number of electrons in the outer most shell.

Question 25: Palette 25/173

Allen MCQ

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:

A

Both are found together in nature

B

Both have nearly the same size

C

Both have similar electronic configurations

D

The ratio of their charge to size is nearly the same

Question 26: Palette 26/173

Allen MCQ

The element having electronic configuration $4f^{14}5d^{0}6s^{2}$ belongs to :-

A

d-block, $12^{th}$ group

B

f-block, III B group

C

f-block, $14^{th}$ group

D

s-block, $2^{nd}$ group

Question 27: Palette 27/173

Allen MCQ

The fourteen elements collectively placed in $3^{rd}$ group and $7^{th}$ period are called :-

A

Typical elements

B

Representative element

C

Actinides

D

Lanthanones

Question 28: Palette 28/173

Allen MCQ

Which of the following statement is wrong for the transition elements:-

A

Transition elements are placed from $3^{\mathrm{rd}}$ to $6^{\mathrm{th}}$ period.

B

Last electron enters in (n-1)d orbital

C

All are solids

D

General electronic configuration is $(\mathbf{n - 1})\mathbf{d}^{1 - 10}\mathbf{ns}^{1 - 2}$

Question 29: Palette 29/173

Allen MCQ

Element with the electronic configuration given below, belong to which group in the periodic table $1s^{2}$ , $2s^{2}2p^{6}$ , $3s^{2}3p^{6}3d^{10}$ , $4s^{2}4p^{6}4d^{10}$ , $5s^{2}5p^{3}$

A

$3^{rd}$

B

$5^{th}$

C

$15^{th}$

D

$17^{th}$

Question 30: Palette 30/173

Allen MCQ

Which of the following electronic configuration belongs to inert gas elements:-

A

$ns^{2}(n-1)d^{10}$

B

$ns^{2}(n-1)s^{2}p^{6}$

C

$ns^{2}np^{6}$

D

None

Question 31: Palette 31/173

Allen MCQ

From atomic number 58 to 71, elements are placed in;-

A

$5^{\text{th}}$ period and III A group

B

$6^{\text{th}}$ period and III B group

C

separate period and group

D

$7^{\text{th}}$ period and IV B group

Question 32: Palette 32/173

Allen MCQ

True statement is :-

A

All the transuranic elements are synthetic elements

B

Elements of third group are called bridge elements

C

Element of $1s^{2}$ configuration is placed in IIA group

D

Electronic configuration of elements of a period is same

Question 33: Palette 33/173

Allen MCQ

An element recently discovered is Uub. Expected electronic configuration of the element is:-

A

[Kr] $5s^{2}4d^{10}$

B

[Xe] $6s^{2}4f^{14}5d^{8}$

C

[Rn] $7s^{2}5f^{14}6d^{10}$

D

[Rn] $7s^{2}5f^{10}d^{0}$

Question 34: Palette 34/173

Allen MCQ

Elements having $ns^{2}$ $np^{6}$ valence shell electronic configuration lies in :-

A

Zero group and $1^{st}-7^{th}$ period

B

$18^{th}$ group and $2^{nd}-7^{th}$ period

C

$18^{th}$ group and $1^{st}-6^{th}$ period

D

All are correct

Question 35: Palette 35/173

Allen MCQ

Certain regular intervals after which the outer electronic configuration of the elements occur are called :-

A

Mass number

B

Atomic numbers

C

Magic numbers

D

Avogadro number

Question 36: Palette 36/173

Allen MCQ

The electronic configuration of elements X and Z are $1s^{2}$ $2s^{2}$ $2p^{6}$ $3s^{2}$ $3p^{5}$ and $1s^{2}$ $2s^{2}$ $2p^{5}$ respectively. What is the position of element X with respect to position of Z in the periodic table -

A

Just below Z

B

Just above Z

C

Left to the Z

D

Right to the Z

Question 37: Palette 37/173

Allen MCQ

Which of the following sequence contains atomic number of only representative elements

A

55, 12, 24, 53

B

13, 33, 59, 83

C

3, 33, 53, 87

D

22, 33, 55, 66

Question 38: Palette 38/173

Allen MCQ

Uranium (At No. - 92) is the last natural element in the periodic table. If the last element of the periodic table which is recently discovered is Uub. What will be the total number of transuranic elements in the periodic table :-

A

21

B

20

C

11

D

12

Question 39: Palette 39/173

Allen MCQ

Which of the following statement is not correct for given electronic configuration $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 4d^{10} 4f^{14} 5s^{2} 5p^{6} 5d^{10} 6s^{2}$

A

It belongs to IIB group and $6^{\text{th}}$ period

B

It is liquid at room temperature

C

It is a transition element

D

It is used in thermometres

Question 40: Palette 40/173

Allen MCQ

Which statement is false:-

A

Screening effect increases down the group

B

$Z_{eff}$ decreases down the group

C

$Z_{eff}$ increases in a period

D

All

Question 41: Palette 41/173

Allen MCQ

Effective nuclear charge in hydrogen is :-

A

more than nuclear charge

B

less than nuclear charge

C

equal to nuclear charge

D

can't predict

Question 42: Palette 42/173

Allen MCQ

In sodium atom, the screening is due to:

A

$3s^{2}$ , $3p^{6}$

B

$2s^{1}$

C

$1s^{2}$ , $2s^{2}$ $2p^{6}$

D

$1s^{2}$ , $2s^{2}$

Question 43: Palette 43/173

Allen MCQ

The screening effect of d- electrons is :-

A

Equal to the p - electrons

B

Much more than p - electrons

C

Same as f - electrons

D

Less than p - electrons

Question 44: Palette 44/173

Allen MCQ

The correct order of size would be:-

A

Ni < Pd ≅ Pt

B

Pd < Pt < Ni

C

Pt > Ni > Pd

D

Pd > Pt > Ni

Question 45: Palette 45/173

Allen MCQ

Which of the following order of radii is correct

A

Li < Be < Mg

B

$H^{+} < Li^{+} < H^{-}$

C

O < F < Ne

D

$Na^{+} > F^{-} > O^{-2}$

Question 46: Palette 46/173

Allen MCQ

K+, Ar, Ca $^{2+}$ and S $^{2-}$ contains-

A

Same electronic configuration and atomic volume

B

Different electronic configuration but same IP.

C

Same electronic configuration but different atomic volume

D

None

Question 47: Palette 47/173

Allen MCQ

Which of the following is not different for an atom and its corresponding ion :-

A

Number of electrons

B

Nuclear charge

C

Size

D

None of these

Question 48: Palette 48/173

Allen MCQ

Which of the following is not isoelectronic series :-

A

Cl $^{-}$ , P $^{3-}$ , Ar

B

N $^{3-}$ , Ne, Mg $^{+2}$

C

B $^{+3}$ , He, Li $^{+}$

D

N $^{3-}$ , S $^{2-}$ , Cl $^{-}$

Question 49: Palette 49/173

Allen MCQ

Which group of atoms have nearly same atomic radius:-

A

Na, K, Rb, Cs

B

Li, Be, B, C

C

Fe, Co, Ni

D

F, Cl, Br, I

Question 50: Palette 50/173

Allen MCQ

Which of the following has largest radius :-

A

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$

B

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{1}$

C

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{3}$

D

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{5}$

Question 51: Palette 51/173

Allen MCQ

Which of the following order of atomic/ionic radius is not correct :-

A

$\mathrm{I}^{-} > \mathrm{I} > \mathrm{I}^{+}$

B

$\mathrm{Mg}^{+2} > \mathrm{Na}^{+} > \mathrm{F}^{-}$

C

$\mathrm{P}^{+5} < \mathrm{P}^{+3}$

D

$\mathrm{Li} > \mathrm{Be} > \mathrm{B}$

Question 52: Palette 52/173

Allen MCQ

In the lithium atom, screening effect of valence shell electron is caused by-

A

Electrons of K and L shell

B

Electrons of K shell

C

Two electrons of $1^{st}$ and one of $2^{nd}$ shell

D

None

Question 53: Palette 53/173

Allen MCQ

Correct order of ionic radii is

A

$Ti^{4+} < Mn^{7+}$

B

$^{37}Cl^{-} < ^{35}Cl^{-}$

C

$K^{+} > Cl^{-}$

D

$P^{3+} > P^{5+}$

Question 54: Palette 54/173

Allen MCQ

S $^{-2}$ is not isoelectronic with :-

A

Ar

B

Cl $^{-}$

C

HS $^{-}$

D

Ti $^{+3}$

Question 55: Palette 55/173

Allen MCQ

The best reason to account for the general tendency of atomic diameters to decrease as the atomic number increases within a period of the periodic table is the fact that

A

Outer electrons repel inner electrons

B

Closer packing among the nuclear particles is achieved

C

The number of neutrons increases

D

The increasing nuclear charge exerts a greater attractive force on the electrons

Question 56: Palette 56/173

Allen MCQ

In an anion :-

A

Number of proton decreases

B

Protons are more than electrons

C

Effective nuclear charge is more

D

Radius is larger than neutral atom

Question 57: Palette 57/173

Allen MCQ

Maximum size of first member of a period is due to

A

Maximum number of shells

B

Maximum screening effect

C

Minimum $Z_{eff}$

D

All

Question 58: Palette 58/173

Allen MCQ

Which of the following ion has largest size:-

A

$\mathrm{F}^{-}$

B

$\mathrm{Al^{+3}}$

C

$\mathrm{Cs^{+}}$

D

$\mathrm{O^{-2}}$

Question 59: Palette 59/173

Allen MCQ

Spot the incorrect order of atomic radii :-

A

$r_{Cu > Zn}$

B

$r_{Cl > F}$

C

$r_{P > S}$

D

$r_{Sc > Ti}$

Question 60: Palette 60/173

Allen MCQ

Incorrect statement is :-

A

Atomic size $\propto$ $Z_{\mathrm{eff}}$

B

Atomic size $\propto$ Negative charge

C

Bond length $\propto$ Size of atoms

D

Atomic size $\propto$ Screening effect

Question 61: Palette 61/173

Allen MCQ

Which of the following orders of atomic radii are correct :-
(a) Li < Be < Na (b) Ni < Cu < Zn
(c) Ti > V > Cr (d) Ti > Zr ≅ Hf
Correct answer is :-

A

All

B

a, b

C

b, c

D

b, d

Question 62: Palette 62/173

Allen MCQ

Decreasing order of size of ions is $\therefore$

A

$\mathrm{Br}^{-} > \mathrm{S}^{-2} > \mathrm{Cl}^{-} > \mathrm{N}^{-3}$

B

$\mathrm{N}^{3-} > \mathrm{S}^{-2} > \mathrm{Cl}^{-} > \mathrm{Br}^{-}$

C

$\mathrm{Br}^{-} > \mathrm{Cl}^{-} > \mathrm{S}^{-2} > \mathrm{N}^{-3}$

D

$\mathrm{N}^{-3} > \mathrm{Cl}^{-} > \mathrm{S}^{-2} > \mathrm{Br}^{-}$

Question 63: Palette 63/173

Allen MCQ

Which of the following statement is wrong:

A

$Z_{\text{eff}}$ in group remains constant

B

In a period atomic size decreases

C

Screening effect in a period remains constant

D

In a period atomic radius of inert gas element is maximum

Question 64: Palette 64/173

Allen MCQ

Which of the following sequence is correct for decreasing order of ionic radius :-

A

Se $^{-2}$ , I $^{-}$ , Br $^{-}$ , O $^{-2}$ , F $^{-}$

B

I $^{-}$ , Se $^{-2}$ , O $^{-2}$ , Br $^{-}$ , F $^{-}$

C

Se $^{-2}$ , I $^{-}$ , Br $^{-}$ , F $^{-}$ , O $^{-2}$

D

I $^{-}$ , Se $^{-2}$ , Br $^{-}$ , O $^{-2}$ , F $^{-}$

Question 65: Palette 65/173

Allen MCQ

According to Slater's rule, order of effective nuclear charge for last electron in case of Li, Na and K:-

A

Li > Na > K

B

K > Na > Li

C

Na > Li > K

D

Li < Na = K

Question 66: Palette 66/173

Allen MCQ

Correct orders of $1^{st}$ I.P. are :- (a) Li < B < Be < C (b) O < N < F (c) Be < N < Ne

A

a, b

B

b, c

C

a, c

D

a, b, c

Question 67: Palette 67/173

Allen MCQ

The ionisation potential of isotopes of an element will be :-

A

Same

B

Different

C

Depends on atomic masses

D

Depends on number of neutrons

Question 68: Palette 68/173

Allen MCQ

Compared to the first ionisation potential, the value of second ionisation potential of an element is :-

A

Negligible

B

Smaller

C

Greater

D

Double

Question 69: Palette 69/173

Allen MCQ

In which of the following pairs, the ionisation energy of the first species is less than that of the second :-

A

O-, O $^{2-}$

B

S, P

C

N, P

D

Be+, Be

Question 70: Palette 70/173

Allen MCQ

The correct order of stability of oxidation state of $Al^{+}$ , $Al^{+2}$ , $Al^{+3}$ is :-

A

$Al^{+3} > Al^{+2} > Al^{+}$

B

$Al^{+2} > Al^{+3} > Al^{+}$

C

$Al^{+2} < Al^{+} > Al^{+3}$

D

$Al^{+3} > Al^{+} > Al^{+2}$

Question 71: Palette 71/173

Allen MCQ

Least ionisation potential will be of:

A

Be $^{3+}$

B

H

C

Li $^{+2}$

D

He $^{+}$

Question 72: Palette 72/173

Allen MCQ

Ionisation energy increases in the order :-

A

Be, B, C, N

B

B, Be, C, N

C

C, N, Be, B

D

N, C, Be, B

Question 73: Palette 73/173

Allen MCQ

IP is influenced by -

A

Size of atom

B

Effective nuclear charge

C

Electrons present in inner shell

D

All

Question 74: Palette 74/173

Allen MCQ

Highest ionisation potential in a period is shown by

A

Alkali metals

B

Noble gases

C

Halogens

D

Representative elements

Question 75: Palette 75/173

Allen MCQ

Which of the following decreases in going down the halogen group :-

A

Ionic radius

B

Atomic radius

C

Ionisation potential

D

None of these

Question 76: Palette 76/173

Allen MCQ

Minimum first ionisation energy is shown by which electronic configuration:-

A

$1s^{2}$ , $2s^{2}$ $2p^{5}$

B

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{2}$

C

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{1}$

D

$1s^{2}$ , $2s^{2}$ $2p^{6}$

Question 77: Palette 77/173

Allen MCQ

With reference to ionisation potential which one of the following set is correct :-

A

Li > K > B

B

B > Li > K

C

Cs > Li > K

D

Cs < Li < K

Question 78: Palette 78/173

Allen MCQ

Successive ionisation energies of an element 'X' are given below (in kcal) IP $_{1}$ IP $_{2}$ IP $_{3}$ IP $_{4}$ 165 195 556 595 Electronic configuration of the element 'X' is:-

A

$1s^{2}$ , $2s^{2}2p^{6}$ , $3s^{2}3p^{2}$

B

$1s^{2}$ , $2s^{1}$

C

$1s^{2}$ , $2s^{2}2p^{2}$

D

$1s^{2}$ , $2s^{2}2p^{6}$ , $3s^{2}$

Question 79: Palette 79/173

Allen MCQ

Second IP of which of the element is maximum-

A

Lithium

B

Oxygen

C

Nitrogen

D

Fluorine

Question 80: Palette 80/173

Allen MCQ

Which has the lowest IE :-

A

$3d^{2}$

B

$4s^{1}$

C

$3p^{3}$

D

$2p^{6}$

Question 81: Palette 81/173

Allen MCQ

The energy needed to remove one electron from unipositive ion is abbreviated as :-

A

$1^{\text{st}}$ I.P.

B

$3^{\text{rd}}$ I.P.

C

$2^{\text{nd}}$ I.P.

D

$1^{\text{st}}$ E.A.

Question 82: Palette 82/173

Allen MCQ

Among the following elements (Whose electronic configuration is given below) the one having the highest ionisation energy is

A

[Ne] $3s^{2}$ $3p^{3}$

B

[Ne] $3s^{2}$ $3p^{4}$

C

[Ne] $3s^{2}$ $3p^{5}$

D

[Ar] $3d^{10}4s^{2}4p^{2}$

Question 83: Palette 83/173

Allen MCQ

The correct order of decreasing first ionisation energy is :-

A

Si > Al > Mg > Na

B

Si > Mg > Al > Na

C

Al > Si > Mg > Na

D

Mg > Li > Al > Si

Question 84: Palette 84/173

Allen MCQ

Out of $Na^{+}$ , $Mg^{+2}$ , $O^{-2}$ and $N^{-3}$ , the pair of species showing minimum and maximum IP would be.

A

$Na^{+}$ , $Mg^{+2}$

B

$Mg^{+2}$ , $N^{-3}$

C

$N^{-3}$ , $Mg^{+2}$

D

$O^{-2}$ , $N^{-3}$

Question 85: Palette 85/173

Allen MCQ

The element having highest I.P. in the two series C, N, O and Si, P, S:-

A

P

B

N

C

S

D

O

Question 86: Palette 86/173

Allen MCQ

Factor which does not affects the ionisation potential

A

Atomic size

B

Atomic mass

C

Effective nuclear charge

D

Shielding effect

Question 87: Palette 87/173

Allen MCQ

Lowest IP will be shown by the element having the configuration :-

A

[He] $2s^{2}$

B

$1s^{2}$

C

[He] $2s^{2} 2p^{2}$

D

[He] $2s^{2} 2p^{5}$

Question 88: Palette 88/173

Allen MCQ

Which ionisation potential (IP) in the following equations involves the greatest amount of energy:-

A

$\mathrm{K}^{+}\rightarrow \mathrm{K}^{+2} + \mathrm{e}^{-}$

B

$\mathrm{Li}^{+}\rightarrow \mathrm{Li}^{+2} + \mathrm{e}^{-}$

C

$\mathrm{Fe}\rightarrow \mathrm{Fe}^{+} + \mathrm{e}^{-}$

D

$\mathrm{Ca}^{+}\rightarrow \mathrm{Ca}^{+2} + \mathrm{e}^{-}$

Question 89: Palette 89/173

Allen MCQ

Values of first four ionisation potential of an elements are 68, 370, 400, 485. It belongs to which of the following electronic configuration:-

A

$1s^{2}$ , $2s^{1}$

B

$1s^{2}$ , $2s^{2}$ $2p^{1}$

C

$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{1}$

D

A and C both

Question 90: Palette 90/173

Allen MCQ

(a) $\mathrm{M}_{(\mathrm{g})}^{-}\rightarrow \mathrm{M}_{(\mathrm{g})}$ (b) $\mathrm{M}_{(\mathrm{g})}\rightarrow \mathrm{M}^{+}_{(\mathrm{g})}$ (c) $\mathrm{M}^{+}_{(\mathrm{g})}\rightarrow \mathrm{M}^{+2}_{(\mathrm{g})}$ (d) $\mathrm{M}^{+2}_{(\mathrm{g})}\rightarrow \mathrm{M}^{+3}_{(\mathrm{g})}$ Minimum and maximum I.P. would be of :-

A

a, d

B

b, c

C

c, d

D

d, a

Question 91: Palette 91/173

Allen MCQ

In the plot of the first ionisation energy against atomic number the peaks are occupied by :-

A

Inert gases

B

Alkali metals

C

Halogens

D

Transition elements

Question 92: Palette 92/173

Allen MCQ

Which one of the following has highest ionisation potential:-

A

Li $^{+}$

B

Mg $^{+}$

C

He

D

Ne

Question 93: Palette 93/173

Allen MCQ

In which of the following pairs, the ionisation energy of the first species is less than that of the second

A

N, P

B

Be+, Be

C

N, N-

D

Ne, Ne+

Question 94: Palette 94/173

Allen MCQ

Consider the following ionisation reactions $A(g) \longrightarrow A^{+}(g) + e^{-} \quad IE \text{ in (kJ/mol) is } A_{1}$ $A^{+}(g) \longrightarrow A^{+2}(g) + e^{-} \quad IE \text{ in (kJ/mol) is } A_{2}$ $A^{+2}(g) \longrightarrow A^{+3}(g) + e^{-} \quad IE \text{ in (kJ/mol) is } A_{3}$ then correct order of IE is :-

A

$A_{1} > A_{2} > A_{3}$

B

$A_{1} = A_{2} = A_{3}$

C

$A_{1} < A_{2} < A_{3}$

D

$A_{3} = A_{2} < A_{1}$

Question 95: Palette 95/173

Allen MCQ

Select the correct order of I.E. :-

A

$Cl^{-} > Cl > Cl^{+}$

B

$Cl^{+} > Cl > Cl^{-}$

C

$Cl > Cl^{+} > Cl^{-}$

D

$Cl^{-} > Cl^{+} > Cl$

Question 96: Palette 96/173

Allen MCQ

In which case the energy released is minimum:-

A

Cl → Cl⁻

B

B → B⁻

C

N → N⁻

D

C → C⁻

Question 97: Palette 97/173

Allen MCQ

In the process $Cl_{(g)} + e^{-} \xrightarrow{\Delta H} Cl^{-}_{(g)}$ , $\Delta H$ is

A

Positive

B

Negative

C

Zero

D

None

Question 98: Palette 98/173

Allen MCQ

Process in which maximum energy is released:-

A

$O \rightarrow O^{-2}$

B

$Mg^{+} \rightarrow Mg^{+2}$

C

$Cl \rightarrow Cl^{-}$

D

$F \rightarrow F^{-}$

Question 99: Palette 99/173

Allen MCQ

Which of the following is energy releasing process

A

$X^{-} \rightarrow X(g) + e^{-}$

B

$O^{-}(g) + e^{-} \rightarrow O^{2-}$

C

$O(g) \rightarrow O^{+}(g) + e^{-}$

D

$O(g) + e^{-} \rightarrow O^{-}(g)$

Question 100: Palette 100/173

Allen MCQ

In which of the following process energy is liberated:-

A

$\mathrm{Cl}\rightarrow \mathrm{Cl}^{+} + \mathrm{e}$

B

$\mathrm{HCl}\rightarrow \mathrm{H}^{+} + \mathrm{Cl}^{-}$

C

$\mathrm{Cl} + \mathrm{e}\rightarrow \mathrm{Cl}^{-}$

D

$0^{-} + \mathrm{e}\rightarrow 0^{-2}$

Question 101: Palette 101/173

Allen MCQ

Element of which atomic number has highest electron affinity:-

A

35

B

17

C

9

D

53

Question 102: Palette 102/173

Allen MCQ

Second electron affinity of an element is :-

A

Always exothermic

B

Endothermic for few elements

C

Exothermic for few elements

D

Always endothermic

Question 103: Palette 103/173

Allen MCQ

The electron affinity

A

Of carbon is greater than oxygen

B

Of fluorine is less than iodine

C

Of fluorine is less than Chlorine

D

Of sulphur is less than oxygen

Question 104: Palette 104/173

Allen MCQ

Which of the following configuration will have least electron affinity.

A

$ns^{2}np^{5}$

B

$ns^{2}np^{2}$

C

$ns^{2}np^{3}$

D

$ns^{2}np^{4}$

Question 105: Palette 105/173

Allen MCQ

Which of the following element will form most stable bivalent anion.

A

Fluorine

B

Oxygen

C

Chlorine

D

Nitrogen
CPT122

Question 106: Palette 106/173

Allen MCQ

Energy absorbed in second electron addition in an atom is called.

A

$1^{st}$ IP

B

$2^{nd}$ EA

C

$1^{st}$ EA

D

$2^{nd}$ IP

Question 107: Palette 107/173

Allen MCQ

The amount of energy released for the process $X_{(g)} + e^{-} \rightarrow X_{-(g)}^{-}$ is minimum and maximum respectively for :- (a) F (b) Cl (c) N (d) B Correct answer is :-

A

c & a

B

d & b

C

a & b

D

c & b

Question 108: Palette 108/173

Allen MCQ

Which of the following electronic configuration is expected to have highest electron affinity:-

A

$2s^{2} 2p^{0}$

B

$2s^{2} 2p^{2}$

C

$2s^{2} 2p^{3}$

D

$2s^{2} 2p^{1}$

Question 109: Palette 109/173

Allen MCQ

Electronegativity scale of pauling is based upon :-

A

Bond length

B

Bond energy

C

Atomic radius

D

Covalent radius

Question 110: Palette 110/173

Allen MCQ

Polarity of a bond can be explained by :-

A

Electron affinity

B

Ionisation potential

C

Electronegativity

D

All of the above

Question 111: Palette 111/173

Allen MCQ

Outermost electronic configuration of the most electronegative element is :-

A

$\mathrm{ns}^2\mathrm{np}^3$

B

$\mathrm{ns}^2\mathrm{np}^6$

C

$\mathrm{ns}^2$

D

$\mathrm{ns}^2\mathrm{np}^5$

Question 112: Palette 112/173

Allen MCQ

Electronegativity values for elements are useful in predicting :-

A

Bond energy of a molecule

B

Polarity of a bond

C

Nature of an oxide

D

All

Question 113: Palette 113/173

Allen MCQ

Mulliken scale of electronegativity uses the concept of :-

A

E. A. and EN of pauling

B

E. A. and atomic size

C

E.A. and I.P.

D

E.A. and bond energy

Question 114: Palette 114/173

Allen MCQ

The pair with minimum difference in electronegativity is :-

A

F, Cl

B

C, H

C

P, H

D

Na, Cs

Question 115: Palette 115/173

Allen MCQ

Least electronegative element is :-

A

I

B

Br

C

C

D

Cs

Question 116: Palette 116/173

Allen MCQ

In which of the following pair of elements the electronegativity of first element is less than that of second element :-

A

Zr, Hf

B

K, Rb

C

Cl, S

D

None of the above

Question 117: Palette 117/173

Allen MCQ

The nomenclature of ICl is iodine chloride because

A

Size of I < Size of Cl

B

Atomic number of I > Atomic number of Cl

C

E.N. of I < E.N. of Cl

D

E. A. of I < E. A. of Cl

Question 118: Palette 118/173

Allen MCQ

Among the following least and most polar bonds are respectively:
(a) C - I (b) N - O
(c) C - F (d) P - F

A

d and c

B

a and d

C

b and d

D

b and c

Question 119: Palette 119/173

Allen MCQ

If the ionisation potential is IP, electron affinity is EA and electronegativity is X then which of the following relation is correct:

A

$2\mathrm{X} - \mathrm{EA} - \mathrm{IP} = 0$

B

$2\mathrm{EA} - \mathrm{X} - \mathrm{IP} = 0$

C

$2\mathrm{IP} - \mathrm{X} - \mathrm{EA} = 0$

D

All of the above

Question 120: Palette 120/173

Allen MCQ

The properties which are not common to both groups 1 and 17 elements in the periodic table are :-

A

Electropositive character increases down the groups

B

Reactivity decreases from top to bottom in these groups

C

Atomic radii increases as the atomic number increases

D

Electronegativity decreases on moving down the group

Question 121: Palette 121/173

Allen MCQ

Electronegativity of an element can be measured using :-

A

Pauling's scale

B

Mulliken's scale

C

Both

D

None

Question 122: Palette 122/173

Allen MCQ

As we proceed across the period in periodic table, we find there is a decrease in :-

A

Ionisation energy

B

Electron affinity

C

Electronegativity

D

Atomic radii

Question 123: Palette 123/173

Allen MCQ

Which compound strongly absorb $\mathrm{CO}_{2}$ ?

A

BeO

B

$\mathrm{K}_{2} \mathrm{O}$

C

$\mathrm{H}_{3} \mathrm{PO}_{4}$

D

$\mathrm{P}_{4} \mathrm{O}_{6}$

Question 124: Palette 124/173

Allen MCQ

The electronegativities of the following elements: H, O, F, S and Cl increase in the order :-

A

$\mathrm{H} < \mathrm{O} < \mathrm{F} < \mathrm{S} < \mathrm{Cl}$

B

$\mathrm{Cl} < \mathrm{H} < \mathrm{O} < \mathrm{F} < \mathrm{S}$

C

$\mathrm{H} < \mathrm{S} < \mathrm{O} < \mathrm{Cl} < \mathrm{F}$

D

$\mathrm{H} < \mathrm{S} < \mathrm{Cl} < \mathrm{O} < \mathrm{F}$ CPT144

Question 125: Palette 125/173

Allen MCQ

Which of the following is different from other three oxides :-

A

MgO

B

SnO

C

PbO

D

ZnO

Question 126: Palette 126/173

Allen MCQ

Which of the following orders of ionic radii is correctly represented?

A

$H^{-} > H^{+} > H$

B

$Na^{+} < F^{-} < O^{2-}$

C

$F^{-} > O^{2-} > Na^{+}$

D

$Al^{3+} > Mg^{2+} > N^{3-}$

Question 127: Palette 127/173

Allen MCQ

$\mathrm{Be}^{2+}$ is isoelectronic with which of the following ions?

A

$\mathrm{H}^{+}$

B

$\mathrm{Li}^{+}$

C

$\mathrm{Na}^{+}$

D

$\mathrm{Mg}^{2+}$

Question 128: Palette 128/173

Allen MCQ

Acidity of diprotic acids in aqueous solutions increases in the order :-

A

$\mathrm{H}_2\mathrm{S} < \mathrm{H}_2\mathrm{Se} < \mathrm{H}_2\mathrm{Te}$

B

$\mathrm{H}_2\mathrm{Se} < \mathrm{H}_2\mathrm{S} < \mathrm{H}_2\mathrm{Te}$

C

$\mathrm{H}_2\mathrm{Te} < \mathrm{H}_2\mathrm{S} < \mathrm{H}_2\mathrm{Se}$

D

$\mathrm{H}_2\mathrm{Se} < \mathrm{H}_2\mathrm{Te} < \mathrm{H}_2\mathrm{S}$

Question 129: Palette 129/173

Allen MCQ

Reason of lanthanoid contraction is :-

A

Negligible screening effect of 'f' orbitals

B

Increasing nuclear charge

C

Decreasing nuclear charge

D

Decreasing screening effect

Question 130: Palette 130/173

Allen MCQ

The species Ar, $K^{+}$ and $Ca^{2+}$ contain the same number of electrons. In which order do their radii increase?

A

$Ca^{2+} < Ar < K^{+}$

B

$Ca^{2+} < K^{+} < Ar$

C

$K^{+} < Ar < Ca^{2+}$

D

$Ar < K^{+} < Ca^{2+}$

Question 131: Palette 131/173

Allen MCQ

The number of d-electrons in $Fe^{2+}$ (Z = 26) is not equal to the number of electrons in which one of the following?

A

p-electrons in Cl (Z = 17)

B

d-electrons in Fe (Z = 26)

C

p-electrons in Ne (Z = 10)

D

s-electrons in Mg (Z = 12)

Question 132: Palette 132/173

Allen MCQ

Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the brackets are atomic numbers).

A

Zr (40) and Nb (41)

B

Zr (40) and Hf (72)

C

Zr (40) and Ta (73)

D

Ti (22) and Zr (40)

Question 133: Palette 133/173

Allen MCQ

The formation of the oxide ion, $O^{2-}$ (g), from oxygen atom requires first an exothermic and then an endothermic step as shown below: $O(g) + e^{-} \rightarrow O_{(g)}^{-}$ ; $\Delta fH^{-} = -141 \, kJ mol^{-1}$ $O^{-}(g) + e^{-} \rightarrow O_{(g)}^{2-}$ ; $\Delta fH^{-} = +780 \, kJ mol^{-1}$ Thus process of formation of $O^{2-}$ in gas phase is unfavourable even thought $O^{2-}$ is isoelectronic with neon. It is due to the fact that,

A

Oxygen is more electronegative

B

Addition of electron in oxygen results in larger size of the ion

C

Electron repulsion outweighs the stability gained by achieving noble gas configuration

D

O-ion has comparatively smaller size than oxygen atom

Question 134: Palette 134/173

Allen MCQ

Which is the correct order of increasing energy of the Columned orbitals in the atom of titanium? (At. no. Z = 22)

A

3s 3p 3d 4s

B

3s 3p 4s 3d

C

3s 4s 3p 3d

D

4s 3s 3p 3d

Question 135: Palette 135/173

Allen MSQ

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

A

$Al^{3+} < Mg^{2+} < Na^{+} < F^{-}$ (increasing ionic size)

B

B < C < N < O (increasing first ionisation enthalpy)

C

I < Br < Cl < F (increasing electron gain enthalpy)

D

Li < Na < K < Rb (increasing metallic radius)

Question 136: Palette 136/173

Allen MCQ

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?

A

Carbon family, [Rn] $5f^{14}$ $6d^{10}$ $7s^{2}$ $7p^{2}$

B

Oxygen family, [Rn] $5f^{14}$ $6d^{10}$ $7s^{2}$ $7p^{4}$

C

Nitrogen family, [Rn] $5f^{14}$ $6d^{10}$ $7s^{2}$ $7p^{6}$

D

Halogen family, [Rn] $5f^{14}$ $6d^{10}$ $7s^{2}$ $7p^{5}$

Question 137: Palette 137/173

Allen MCQ

Which of the following oxides is most acidic in nature?

A

MgO

B

BeO

C

BaO

D

CaO

Question 138: Palette 138/173

Allen MCQ

The correct order of atomic radii in group 13 elements is

A

B < Al < In < Ga < Tl

B

B < Al < Ga < In < Tl

C

B < Ga < Al < Tl < In

D

B < Ga < Al < In < Tl

Question 139: Palette 139/173

Allen MCQ

Which of the following is an amphoteric hydroxide?

A

$Sr(OH)_2$

B

$Ca(OH)_2$

C

$Mg(OH)_2$

D

$Be(OH)_2$

Question 140: Palette 140/173

Allen MCQ

For the second period elements the correct increasing order of first ionisation enthalpy is:-

A

Li < Be < B < C < N < O < F < Ne

B

Li < B < Be < C < O < N < F < Ne

C

Li < B < Be < C < N < O < F < Ne

D

Li < Be < B < C < O < N < F < Ne

Question 141: Palette 141/173

Allen MCQ

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :-

A

$5\mathrm{f} > 6\mathrm{p} > 5\mathrm{p} > 4\mathrm{d}$

B

$6\mathrm{p} > 5\mathrm{f} > 5\mathrm{p} > 4\mathrm{d}$

C

$6\mathrm{p} > 5\mathrm{f} > 4\mathrm{d} > 5\mathrm{p}$

D

$5\mathrm{f} > 6\mathrm{p} > 4\mathrm{d} > 5\mathrm{p}$

Question 142: Palette 142/173

Allen MCQ

Match the oxide given in column A with its property given in column B:
Which of the following options has all correct pairs? Match the Column-I
Column-II:

Column-I	Column-II
(A) $Na_{2}O$ (B) $Al_{2}O_{3}$ (C) $N_{2}O$ (D) $Cl_{2}O_{7}$	(P) Neutral (Q) Basic (R) Acidic (S) Amphoteric

A

A-Q, B-P, C-S, D-R

B

A-R, B-Q, C-P, D-S

C

A-P, B-S, C-Q, D-R

D

A-Q, B-S, C-P, D-R

Question 143: Palette 143/173

Allen Match the Columns

Identify the incorrect match:
(Name), (IUPAC Official Name)

Column-I	Column-II
(A) Unnilunium (B) Unniltrium (C) Unnilhexium (D) Unununnium	(I) Mendelevium (II) Lawrencium (III) Seaborgium (IV) Darmstadtium

A

(d), (iv)

B

(a), (i)

C

(b), (ii)

D

(c), (iii)

Question 144: Palette 144/173

Allen MCQ

Match the following:
Column-I (Oxide), Column-II (Nature)
Which of the following is correct option?

Column-I	Column-II
(A) CO (B) BaO (C) $Al_{2}O_{3}$ (D) $Cl_{2}O_{7}$	(P) Basic (Q) Neutral (R) Acidic (S) Amphoteric

A

A-S, B-R, C-Q, D-P

B

A-P, B-Q, C-R, D-S

C

A-Q, B-P, C-S, D-R

D

A-R, B-S, C-P, D-Q

Question 145: Palette 145/173

Allen MCQ

Match the element in Column-I with Column-II. Identify the correct match :

Column-I	Column-II
(A) Copper (B) Fluorine (C) Silicon (D) Cerium	(P) Non-metal (Q) Transition metal (R) Lanthanoid (S) Metalloid

A

A-Q, B-S, C-P, D-R

B

A-Q, B-P, C-S, D-R

C

A-S, B-R, C-P, D-Q

D

A-P, B-Q, C-R, D-S

Question 146: Palette 146/173

Allen MCQ

Which of the following oxide is amphoteric in nature?

A

$SnO_{2}$

B

$SiO_{2}$

C

$GeO_{2}$

D

$CO_{2}$

Question 147: Palette 147/173

Allen MCQ

Statement-I : Acid strength increases in the order given as HF << HCl << HBr << HI. Statement-II : As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.

A

Both Statement-I and Statement-II are true.

B

Both Statement-I and Statement-II are false.

C

Statement-I is correct but Statement-II is false.

D

Statement-I is incorrect but Statement-II is true.

Question 148: Palette 148/173

Allen MCQ

Zr (Z =40) and Hf (Z =72) have similar atomic and ionic radii because of:

A

belonging to same group

B

diagonal relationship

C

lanthanoid contraction

D

having similar chemical properties

Question 149: Palette 149/173

Allen MCQ

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

A

HF < HCl < HBr < HI :Increasing acidic strength

B

$H_{2}O < H_{2}S < H_{2}Se < H_{2}Te$ :Increasing pK $_{a}$ values

C

$NH_{3} < PH_{3} < AsH_{3} < SbH_{3}$ :Increasing acidic character

D

$CO_{2} < SiO_{2} < SnO_{2} < PbO_{2}$ :Increasing oxidizing power

Question 150: Palette 150/173

Allen MCQ

The IUPAC name of an element with atomic number 119 is

A

unnilennium

B

unununnium

C

ununoctium

D

ununennium

Question 151: Palette 151/173

Allen MCQ

If first ionization enthalpies of element X and Y are 419 kJ mol $^{-1}$ and 590 kJ mol $^{-1}$ , respectively and second ionization enthalpies of X and Y are 3069 kJ mol $^{-1}$ and 1145 kJ mol $^{-1}$ , respectively. Then correct statement is :-

A

X is an alkali metal and Y is an alkaline earth metal.

B

X is an alkaline earth metal and Y is an alkali metal.

C

Both X and Y are alkali metals.

D

Both X and Y are alkaline earth metals.

Question 152: Palette 152/173

Allen MCQ

The correct order of first ionization enthalpy for the given four element is:

A

C < N < F < O

B

C < N < O < F

C

C < O < N < F

D

C < F < N < O

Question 153: Palette 153/173

Allen MCQ

The element expected to form largest ion to achieve the nearest noble gas configuration is

A

F

B

N

C

Na

D

O

Question 154: Palette 154/173

Allen MCQ

Which of the following is correctly matched?

A

Basic oxides $\Rightarrow$ In $_{2}$ O $_{3}$ , K $_{2}$ O, SnO $_{2}$

B

Neutral oxides $\Rightarrow$ CO, NO $_{2}$ , N $_{2}$ O

C

Acidic oxides $\Rightarrow$ Mn $_{2}$ O $_{7}$ , SO $_{2}$ , TeO $_{3}$

D

Amphoteric oxides $\Rightarrow$ BeO, Ga $_{2}$ O $_{3}$ , GeO

Question 155: Palette 155/173

Allen MCQ

The correct sequence given below containing neutral, acidic, basic and amphoteric oxide each, respectively, is

A

NO, ZnO, CO₂, CaO

B

ZnO, NO, CaO, CO₂

C

NO, CO₂, ZnO, CaO

D

NO, CO₂, CaO, ZnO

Question 156: Palette 156/173

Allen MCQ

Arrange the following elements in increasing order of electronegativity. N, O, F, C, Si Choose the correct answer from the options given below:

A

Si < C < N < O < F

B

Si < C < O < N < F

C

O < F < N < C < Si

D

F < O < N < C < Si

Question 157: Palette 157/173

Allen MCQ

Arrange the following elements in increasing order of first ionization enthalpy: Li, Be, B, C, N Choose the correct answer from the options given below :

A

Li < Be < B < C < N

B

Li < B < Be < C < N

C

Li < Be < C < B < N

D

Li < Be < N < B < C

Question 158: Palette 158/173

Allen MCQ

The correct decreasing order of atomic radii (pm) of Li, Be, B and C is:

A

Be > Li > B > C

B

Li > Be > B > C

C

C > B > Be > Li

D

Li > C > Be > B

Question 159: Palette 159/173

Allen MCQ

Match Column-I(Block/group in (Element periodic table) with Column-II(Element).
Choose the correct answer from the options given below :

Column-I	Column-II
(A) Lanthanoid (B) d-block element (C) p-block element (D) s-block element	(P) Ce (Q) As (R) Cs (S) Mn

A

A-P, B-Q, C-S, D-R

B

A-P, B-S, C-R, D-Q

C

A-P, B-S, C-Q, D-R

D

A-S, B-P, C-Q, D-R

Question 160: Palette 160/173

Allen MCQ

Given below are two statements:Statement-I : F, atom has less negative electron gain enthalpy than Cl, atomStatement-II : Addition of electron is more effective in 3p orbital of Cl atom than 2p orbital of F atom. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement-I ; II both are correct.

B

Statement-I is correct but II are incorrect.

C

Statement-I is incorrect but II is correct.

D

Both statement-I ; II are incorrect.

Question 161: Palette 161/173

Allen MCQ

Given below are two statements:Statement-I : In Lanthenoid series 14 elements are presentStatement-II : f orbital can consist maximum 14 electrons. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement-I & II both are correct.

B

Statement-I is correct but II are incorrect.

C

Statement-I is incorrect but II is correct.

D

Both statement-I & II are incorrect.

Question 162: Palette 162/173

Allen MCQ

Given below are two statements:Statement-I : Atomic radius of Ga is less than AlStatement-II : Effective nuclear charge of Ga is greater than Al. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement-I ; II both are correct.

B

Statement-I is correct but II are incorrect.

C

Statement-I is incorrect but II is correct.

D

Both statement-I II are incorrect.

Question 163: Palette 163/173

Allen MCQ

Given below are two statements:Statement-I : The radius of 5d series element is nearly similar to the 4d series element.Statement-II : Due to poor shielding effect of 4f e- Effective nuclear charge of 5d series elements is greater than that of 4d series elements. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement-I ; II both are correct.

B

Statement-I is correct but II are incorrect.

C

Statement-I is incorrect but II is correct.

D

Both statement-I ; II are incorrect.

Question 164: Palette 164/173

Allen MCQ

Given below are two statements:Statement-I : The formation of $O^{-2}$ is endothermicStatement-II : Ionisation energy of $S^{-}$ is more than $O^{-}$. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement-I & II both are correct.

B

Statement-I is correct but II are incorrect.

C

Statement-I is incorrect but II is correct.

D

Both statement-I & II are incorrect.

Question 165: Palette 165/173

Allen MCQ

Which of the following are true :
(a) $EA_1(F) > EA_1(Cl)$
(b) $EA_1(Br) > EA_1(I)$
(c) $EA_1(Br) > EA_1(F)$
(d) $EA_1(Cl) > EA_1(F)$

A

If (a) (b) and (c) are correct.

B

If (a) & (b) both options are correct.

C

If (b) and (d) both options are correct.

D

If (a) and (c) both options are correct.

Question 166: Palette 166/173

Allen MCQ

Assertion (A) : Generally, ionisation enthalpy increase from left to right in a period Reason (R) : In a Period, $Z_{eff}$ Increases from left to right. In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is not correct.

C

(A) is not correct but (R) is correct.

D

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Question 167: Palette 167/173

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Generally electron gain enthalpy become's more negative as we go down a group
Reason (R) : Chlorine has maximum value of electron gain enthalpy in periodic Table.
In the light of the above statements,
choose the most appropriate answer from the options given below:

A

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is not correct.

C

(A) is not correct but (R) is correct.

D

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Question 168: Palette 168/173

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In Mg, Al and Si First ionisation enthalpy of Mg is more then Al but less then Si
Reason (R): $Z_{eff}$ of Mg > Al.
In the light of the above statements,
choose the most appropriate answer from the options given below:

A

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is not correct.

C

(A) is not correct but (R) is correct.

D

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Question 169: Palette 169/173

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In Ionisation energy, Electron affinity and Electronegativity only EN value regularly increase in a period.
Reason (R) : EN value of carbon atom are same in all compound of carbon.
In the light of the above statements,
choose the most appropriate answer from the options given below :

A

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is not correct.

C

(A) is not correct but (R) is correct.

D

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Question 170: Palette 170/173

Allen MCQ

Match the Column-I with Column-II

Column-I	Column-II
(A) Be (B) N (C) O (D) C	(P) 88 (Q) 70 (R) 111 (S) 74

A

A – S, B – R, C – P, D – Q

B

A – Q, B – R, C – P, D – S

C

A – R, B – S, C – Q, D – P

D

A – Q, B – P, C– R, D –S

Question 171: Palette 171/173

Allen MCQ

Match the Column-I with Column-II:

Column-I	Column-II
(A) 1s² 2s² 2p⁶ (B) 1s² 2s² 2p⁶ 3s¹ (C) 1s² 2s² 2p⁵ (D) 1s² 2s² 2p⁴	(P) −53 (Q) −333 (R) −141 (S) +116

A

A - S, B -Q, C - P, D - R

B

A - S, B - P, C - Q, D - R

C

$A - R, B- S, C - Q, D - P$

D

A - Q, B - R, C- P, D - S

Question 172: Palette 172/173

Allen MCQ

Match the Column-I with Column-II :

Column-I	Column-II
(A) B > Tl > Ga > Al > In (B) Cl > F > Br > I (C) F > Cl > Br > I (D) B < Ga < Al < In < Tl	(P) Electron affinity (EA) (Q) Electronegativity (EN) (R) Ionisation energy (IP) (S) Atomic radius

A

$A - \mathrm{P}, B - \mathrm{Q}, C - \mathrm{S}, D- \mathrm{R}$

B

$A - P, B - Q, C - R, IV - S$

C

$A - \mathrm{R}, B - \mathrm{P}, C- \mathrm{Q}, D - \mathrm{S}$

D

$A - \mathrm{S}, B - \mathrm{R}, C- \mathrm{Q}, D - \mathrm{P}$

Question 173: Palette 173/173

Allen MCQ

Match the Column-I with Column-II :

Column-I	Column-II
(A) $(n-1)d^5,ns^1$ (B) $(n-1)f^{14}(n-1)d^0,ns^2$ (C) $(n-1)d^{10},ns^2,np^3$ (D) $(n-1)d^{10},ns^1$	(P) 3rd (Q) 15th (R) 11th (S) 6th

A

$A - \mathrm{S}, B- \mathrm{Q}, C - \mathrm{P}, D - \mathrm{R}$

B

$A - \mathrm{S}, B - \mathrm{P}, C - \mathrm{Q}, D - \mathrm{R}$

C

$A- \mathrm{R}, B - \mathrm{S}, C- \mathrm{Q}, D - \mathrm{P}$

D

$A - \mathrm{Q}, B - \mathrm{R}, C - \mathrm{P}, D - \mathrm{S}$