← Back to Chemistry-I

Classification of Elements and Periodicity in Properties

173 Questions Start Allen Test
All Exams Errorless Allen
Q26 Allen 2. PERIOD, GROUP AND BLOCK 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
Q27 Allen 2. PERIOD, GROUP AND BLOCK 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
Q28 Allen 2. PERIOD, GROUP AND BLOCK 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 $(\mathbf{n - 1})\mathbf{d}^{1 - 10}\mathbf{ns}^{1 - 2}$
Q29 Allen 2. PERIOD, GROUP AND BLOCK 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.
$17^{th}$
Q30 Allen 2. PERIOD, GROUP AND BLOCK 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
Q31 Allen 2. PERIOD, GROUP AND BLOCK 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
Q32 Allen 2. PERIOD, GROUP AND BLOCK 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
Q33 Allen 2. PERIOD, GROUP AND BLOCK 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] $7s^{2}5f^{10}d^{0}$
Q34 Allen 2. PERIOD, GROUP AND BLOCK 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
Q35 Allen 2. PERIOD, GROUP AND BLOCK 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
Q36 Allen 2. PERIOD, GROUP AND BLOCK 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
Q37 Allen 2. PERIOD, GROUP AND BLOCK 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
Q38 Allen 2. PERIOD, GROUP AND BLOCK 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
Q39 Allen 2. PERIOD, GROUP AND BLOCK 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
Q40 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q41 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q42 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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.
$1s^{2}$ , $2s^{2}$
Q43 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q44 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
The correct order of size would be:-
A.
Ni < Pd ā‰… Pt
B.
Pd < Pt < Ni
C.
Pt > Ni > Pd
D.
Pd > Pt > Ni
Q45 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following order of radii is correct
A.
Li < Be < Mg
B.
$H^{+} < Li^{+} < H^{-}$
C.
O < F < Ne
D.
$Na^{+} > F^{-} > O^{-2}$
Q46 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q47 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q48 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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 $^{-}$
Q49 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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
Q50 Allen 3. Zeff, SCREENING CONSTANT & ATOMIC RADIUS 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.
$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{5}$