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Classification of Elements and Periodicity in Properties

571 Questions Start Errorless Test
All Exams Errorless Allen
CPMT 2010 Q101 Errorless Electronegativity MCQ
The chemical elements are arranged in the order of increasing electronegativities in the sequence
A.
P, Si, Se, Br, N
B.
Si, Se, P, Br, N
C.
Si, P, Se, Br, N
D.
Se, P, Si, Br, N
WB JEE 2010 Q102 Errorless Valency and oxidation state MCQ
In a periodic table the basic character of oxides
A.
Increases from left to right and decreases from top to bottom
B.
Decreases from right to left and increases from top to bottom
C.
Decreases from left to right and increases from top to bottom
D.
Decreases from left to right and increases from bottom to top
Kerala PET 2010 Q103 Errorless Critical Thinking MCQ
The first $(\Delta_{i}H_{1})$ and second $(\Delta_{i}H_{2})$ ionisation enthalpies (in $kJ mol^{-1}$ ) and the electron gain enthalpy $(\Delta_{eg}H)$ (in $kJ mol^{-1}$ ) of the elements I, II, III, IV and V are given below
Element $\Delta_{i}H_{1}$ $\Delta_{i}H_{2}$ $\Delta_{eg}H$
I5207300-60
II4193051-48
III16813374-328
IV10081846-295
V23725251+48
The most reactive metal and the least reactive non-metal of these are respectively
A.
I and V
B.
V and II
C.
II and V
D.
IV and V
E.
V and III
AMU (Engg.) 2009 Q104 Errorless Extended or long form of periodic table MCQ
The element with atomic number 117 if discovered would be placed in
A.
Noble gas family
B.
Alkali family
C.
Alkaline earth family
D.
Halogen family
J & K CET 2009 Q105 Errorless Extended or long form of periodic table MCQ
Which one of the following is a 'd-block element'
A.
Gd
B.
Hs
C.
Es
D.
Cs
DCE 2009 Q106 Errorless Critical Thinking MCQ
Which is not the correct order for the stated property
A.
$Ba > Sr > Mg$ : atomic radius
B.
$F > O > N$ : first ionisation enthalpy
C.
$Cl > F > I$ : electron affinity
D.
$O > Se > Te$ : electronegativity
Kerala PMT 2008 Q107 Errorless Extended or long form of periodic table MCQ
An element $X$ belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of $X$ ? It has
A.
Partially filled $d$ orbitals and completely filled $s$ orbitals
B.
Completely filled s-orbital and completely filled p-orbitals
C.
Completely filled s-orbital and half-filled p-orbitals
D.
Half-filled d-orbitals and completely filled s-orbitals
E.
Completely filled d, s and p-orbitals
Kerala PMT 2008 Q108 Errorless Atomic and Ionic radii MCQ
Which one of the ions in the table below would have the largest value of enthalpy of hydration Ionic radius in nm Charge of ion
A.
0.0065 +2
B.
0.095 +1
C.
0.135 +2
D.
0.169 +1
E.
0.181 -1
KCET 2008 Q109 Errorless Ionisation Energy MCQ
The correct order in which the first ionisation potential increases is
A.
K, Be, Na
B.
Be, Na, K
C.
Na, K, Be
D.
K, Na, Be
Kerala PET 2008 Q110 Errorless Electron affinity MCQ
The electronic configuration of the element with maximum electron affinity is
A.
$1s^{2}, 2s^{2}, 2p^{3}$
B.
$1s^{2}, 2s^{2}, 2p^{5}$
C.
$1s^{2}, 2s^{2}, 2p^{6}, 3s^{2}, 3p^{5}$
D.
$1s^{2}, 2s^{2}, 2p^{6}, 3s^{2}, 3p^{3}$
E.
$1s^{2}, 2s^{2}, 2p^{6}, 3s^{1}$
Kerala PET 2008 Q111 Errorless Electron affinity MCQ
Match the entries Columned in Column-I with appropriate properties Columned in Column-II.
Column-IColumn-II
(P)He
(Q)Cl
(R)Ca
(S)Li
(I)High electron affinity
(II)Most electropositive element
(III)Strongest reducing agent
(IV)Highest ionization energy
A.
pā€“iii, qā€“i, rā€“ii, sā€“iv
B.
pā€“iv, qā€“iii, rā€“ii, sā€“i
C.
pā€“ii, qā€“iv, rā€“i, sā€“iii
D.
pā€“i, qā€“ii, rā€“iii, sā€“iv
E.
pā€“iv, qā€“i, rā€“ii, sā€“iii
Kerala PMT 2008 Q112 Errorless Critical Thinking MCQ
Which two elements in the periodic table would you expect to combine in the most violent fashion
A.
H and O
B.
Cl and F
C.
Mg and N
D.
P and O
E.
Cs and F
MP PMT 2008 Q113 Errorless Critical Thinking MCQ
Which of the following is arranged in order of increasing density
A.
$Al < Mg < C_{(\text{graphite})} < B$
B.
$B < Al < Mg < C_{(\text{graphite})}$
C.
$C_{(\text{graphite})} < Al < B < Mg$
D.
$Mg < C_{(\text{graphite})} < B < Al$
CBSE PMT 2007; CBSE PMT (Pre.) 2010; WB JEE 2012 Q114 Errorless Atomic and Ionic radii MCQ
Identify the correct order of the size of the following
A.
$Ca^{2+} < K^{+} < Ar < S^{2-} < Cl^{-}$
B.
$Ca^{2+} < K^{+} < Ar < Cl^{-} < S^{2-}$
C.
$Ar < Ca^{2+} < K^{+} < Cl^{-} < S^{2-}$
D.
$Ca^{2+} < Ar < K^{+} < Cl^{-} < S^{2-}$
UPCPMT 2007 Q115 Errorless Atomic and Ionic radii MCQ
Difference between $S$ and $S^{2-}$ as $S^{2-}$ has
A.
Larger radii and large size
B.
Smaller radii and large size
C.
Larger radii and small size
D.
Smaller radii and small size
UPCPMT 2007 Q116 Errorless Atomic and Ionic radii MCQ
Increase in atomic size down the group is due to
A.
Increase in number of electrons
B.
Increase in number of protons and neutrons
C.
Increase in number of protons
D.
Increase in number of protons, neutrons and electrons
CBSE PMT 2007 Q117 Errorless Ionisation Energy MCQ
With which of the following electronic configuration an atom has the lowest ionisation enthalpy
A.
$1s^{2}2s^{2}2p^{5}$
B.
$1s^{2}2s^{2}2p^{3}$
C.
$1s^{2}2s^{2}2p^{5}3s^{1}$
D.
$1s^{2}2s^{2}2p^{6}$
UPCPMT 2007 Q118 Errorless Ionisation Energy MCQ
Which of the following has lowest ionisation energy
A.
Oxygen
B.
Nitrogen
C.
Fluorine
D.
Sulphur
CBSE PMT 2007 Q119 Errorless Electron affinity MCQ
Which one of the following ionic species has the greatest proton affinity to form stable compound
A.
$HS^{-}$
B.
$NH_{2}^{-}$
C.
$F^{-}$
D.
$I^{-}$
MP PMT 2007 Q120 Errorless Electronegativity MCQ
Between $HF, HCl, HBr$ and $HI, HF$ has the highest ionic character because
A.
$F$ has the highest electron affinity
B.
In $HF$ , electronegativity difference is highest
C.
$F^{-}$ ion has the highest value of ionic radius
D.
Atomic orbitals of $H$ and $F$ have almost similar energy
UPCPMT 2007 Q121 Errorless Electronegativity MCQ
Which of the following is second most electronegative element
A.
Chlorine
B.
Oxygen
C.
Sulphur
D.
Fluorine
Kerala PMT 2006 Q122 Errorless Extended or long form of periodic table MCQ
Which of the following statements is/are NOT TRUE about the diagonal relationship of Be and Al
(i) Both react with NaOH to liberate hydrogen
(ii) Their oxides are basic
(iii) They are made passive by nitric acid
(iv) Their carbides give acetylene on treatment with water
A.
Only (i)
B.
(ii) and (iii)
C.
Only (iv)
D.
(i) and (iv)
E.
(ii) and (iv)
Kerala PMT 2006 Q123 Errorless Extended or long form of periodic table MCQ
The electronic configuration of four elements are (1) $[Xe]6s^{1}$ (2) $[Xe]4f^{14}5d^{1}6s^{2}$ (3) $[Ar]4s^{2}4p^{5}$ (4) $[Ar]3d^{7}4s^{2}$ Which one of the following statements about these elements is NOT correct
A.
1 is a strong reducing agent
B.
2 is a $d$ -block element
C.
3 has high electron affinity
D.
4 shows variable oxidation state
E.
The compound formed between 1 and 3 is ionic
RPMT 2006 Q124 Errorless Extended or long form of periodic table MCQ
Which of the following element is a metalloid
A.
Bi
B.
Sn
C.
Ge
D.
C
AIEEE 2006 Q125 Errorless Extended or long form of periodic table MCQ
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture
A.
The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group
B.
In both alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group
C.
Chemical reactivity increase with increase in atomic number down the group in both the alkali metals and halogens
D.
In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group