Classification of elements and periodicity in properties with Answer

1. Classification of Elements and Periodicity in Properties
1. Which of the following elements will
have the highest electron affinity?
(a) Chlorine (b) Nitrogen
(c) Phosphorus (d) Fluorine
2. Which of the following alkaline earth
metals has highest ionic mobility in
aqueous solution?
(a) 2
Be 
(b) 2
Ca 
(c) 2
Ba 
(d) 2
Mg 
3. The element, with atomic number 118,
will be
(a) a transition element
(b) an alkali metal
(c) an alkaline earth metal
(d) a noble gas
4. Which of the following has the
maximum electronegativity?
(a) C (b) F
(c) N (d) O
5. In the 3 2
,P S 
and Cl
ions, the
increasing order of size is
(a) 2 3
S Cl P  
 
(b) 2 3
Cl S P  
 
(c) 2 3
S P Cl  
 
(d) 3 2
P S Cl  
 
6. The electronic configuration
2 2 5 1
1 2 2 3s s p s shows
(a) ground state of fluorine atom
(b) excited state of fluorine atom
(c) excited state of neon atom
(d) excited state of ion 2O
7. Which of the following is the most
electropositive element?
(a) Phosphorus (b) Magnesium
(c) Aluminium (d) Sulphur
8. Which of the following has maximum
ionization potential?
(a) Na (b) K
(c) Be (d) Mg
9. Which of the following ions in aqueous
solution is the best conductor of
electricity?
(a) Li
(b) Na
(c) 2
Mg 
(d) Cs
10. Which of the following has highest
second ionisation energy?
(a) Ni (b) V
(c) Cr (d) Mn
11. The pair of amphoteric hydroxides is
(a)  3
,Al OH LiOH
(b)    2 2
,Be OH Mg OH
(C)    3 2
,B OH Be OH
(d)    2 2
,Be OH Zn OH
12. Largest difference in radii is found in
case of the pair
(a) Li, Na (b) Na, K
(c) K, Rb (d) Rb, Cs
13. The element Z=114 has been
discovered recently. It will belong to
which of the following family/group
and electronic configuration?
(a)Carbon family  14 10 2 2
5 6 7 7Rn f d s p
(b)Oxygen family,   14 10 2 4
5 6 7 7Rn f d s p
(c)Nitrogen family,  14 10 2 6
5 6 7 7Rn f d s p
(d)Halogen family,  14 10 2 5
5 6 7 7Rn f d s p
14. The element, with atomic number 118,
will be
(a) alkali (b) noble gas
(c) lanthanide (d)transition element

2. 15. The electronic configuration of an
element is 2 2 6 2 3
1 2 2 3 3s s p s p . What is
the atomic number of the element,
which is just below the above element
in the periodic table?
(a) 33 (b) 34
(c) 36 (d) 49
16. In which of the following options the
order of arrangement does not agree
with the variation of property indicated
against it?
(a) 3 2
Al Mg Na F   
   (increasing
ionic size)
(b) B < C < N < O (increasing first
ionization enthalpy)
(c) I < Br < Cl < F (increasing electron
gain enthalpy)
(d) Li < Na < K < Rb (increasing
metallic radius)
17. The species Ar, K
and 2
Ca 
contain
the same number of electrons. In which
order do their radii increase?
(a) 2
Ca Ar K 
 
(b) 2
Ca K Ar 
 
(c) 2
Ca Ar K 
 
(d) 2
Ar K Ca 
 
18. The formation of the oxide ion
 2
,O g
from oxygen atom requires
first an exothermic and then an
endothermic step as shown below:
    1
; 141 kJ molfO g e O g H   
    
   2 1
; 780 kJ molfO g e O g H    
    
Thus process of formation of 2
O 
in gas
phase is unfavourable even though 2
O 
is isoelectronic with neon. It is due to
the fact that
(a) Electron repulsion outweighs the
stability gained by achieving noble gas
configuration
(b) O
ion has comparatively smaller
size than oxygen atom
(c) Oxygen is more electronegative
(d) Addition of electron in oxygen
results in larger size of the ion.
19. Which one of the following
arrangements represents the correct
order of least negative to most negative
electron gain enthalpy for C, Ca, Al, F
and O?
(a) Ca < Al < C < O < F
(b) Al < Ca < O < C < F
(c) Al < O < C < Ca < F
(d) C < F < O < Al < Ca
20. What is the value of electron gain
enthalpy of Na
if 1E of Na = 5.1 eV?
(a) 5.1 eV (b) 10.2 eV
(c) + 2.55 eV (d) + 10.2 eV
21. Among the elements Ca, Mg, P and Cl,
the order of increasing atomic radii is:
(a) Ca < Mg < P < Cl
(b) Mg < Ca < Cl < P
(c) Cl < P < Mg < Ca
(d) P < Cl < Ca < F
22. Which of the following represents the
correct order of increasing electron
gain enthalpy with negative sign for the
elements O, S, F and Cl?
(a) Cl < F < O < S (b) O < S < F < Cl
(c) F < S < O < Cl (d) S < O < Cl < F
23. Amongst the elements with following
electronic configurations, which one of
them may have the highest ionization
energy?

3. (a) 2 2
3 3Ne s p   (b) 10 2 3
3 4 4Ar d s p  
(c) 2 1
3 3Ne s p   (d) 2 3
3 3Ne s p  
24. Which of the following electronic
configuration of an atom has the lowest
ionization enthalpy?
(a) 2 2 3
1 2 2s s p (b) 2 2 5 1
1 2 2 3s s p s
(c) 2 2 6
1 2 2s s p (d) 2 2 5
1 2 2s s p
25. Ionic radii are
(a) inversely proportional to effective
nuclear charge
(b) inversely proportional to square of
effective nuclear charge
(c) directly proportional to effective
nuclear charge
(d) directly proportional to square of
effective nuclear charge
26. Which of the following order is wrong?
(a) 3 3 3NH PH AsH Acidic  
(b) First IPLi Be B C   
(c) 2 3 2 2Al O MgO Na O K O Basic   
(d) Li Na K Cs Ionic radius   
   
27. Correct order of first IP among
following elements Be, B, C, N, O is
(a) B < Be < C < O < N
(b) Be < Be < C < N < O
(c) Be < B < C < N < O
(d) Be < B < C < O < N
28. The first ionization potentials (eV) of
Be and B respectively are
(a) 8.29, 9.32 (b) 9.32, 9.32
(c) 8.29, 8.29 (d) 9.32, 8.29
29. Which of the following does not
represent the correct order of the
properties indicated?
(a) 2 2 2 2
Ni Cr Fe Mn   
   (size)
(b) Sc > Ti > Cr > Mn (size)
(c) 2 2 2 2
Mn Ni Co Fe   
  
(unpaired electron)
(d) 2 2 2 2
Fe Co Ni Cu   
  
(unpaired electron)
30. Which one of the following ions will be
the smallest in size?
(a) Na
(b) 2
Mg 
(c) F
(d) 2O
31. Among the following oxides, the one
which is most basic is
(a) ZnO (b) MgO
(c) 2 3Al O (d) 2 5N O
32. The 1 2 3 4, , ,IP IP IP IP and 5IP of an
element are 7.1, 14.3, 34.5, 46.8, and
162.2 eV respectively. The element is
likely to be
(a)Na (b) Si
(c) F (d) Ca
33. Pd has exceptional valence shell
electronic configuration of 10 0
4 5d s . It
is a member of
(a) 5th
period, Group 10
(b) 4th
Period, Group 12
(c) 6th
Period, Group 10
(d) 5th
Period, Group 14
34. The electronic configuration of an
element is 2 2 6 2 4
1 ,2 2 ,3 3s s p s p . The
atomic number of the element present
just below the above element in the
periodic table is
(a) 36 (b) 34
(c) 33 (d) 32
35. Calculate the energy needed to convert
three moles of sodium atoms in the
gaseous state to sodium ions. The
ionization energy of sodium is
495 1
kJ mol
(a) 1485 kJ (b) 495 kJ
(c) 148.5 kJ (d) None

4. 36. The paramagnetic species among the
following is 2 3
, , ,Na Zn Cu Fe   
(a) Na
(b) 2
Zn 
(c) Cu
(d) 3
Fe 
37. The correct decreasing order of atomic
size among the following species is:
2 2
, , , ,Ar K Cl S Ca   
(a) 2 2
Ca K Ar Cl S   
   
(b) 2 2
K Ca Cl Ar S   
   
(c) 2 2
S Cl Ar K Ca   
   
(d) 2 2
S Ar Cl Ca K   
   
38. Which is correct in the following?
(a) Radius of Cl atom is 0.99
o
A , while
that of Cl
ion is 1.54
o
A
(b) Radius of Cl atom is 0.99
o
A , while
that of Na atom is 1.54
o
A
(c) Radius of Cl atom is 0.95
o
A , while
that of Cl
ion is 0.81
o
A
(d) Radius of Na atom is 0.95
o
A , while
that of Na
ion is 1.54
o
A
39. Which oxide of N is isoelectronic with
2CO ?
(a) 2NO (b) NO
(c) 2N O (d) 2 3N O
40. Ionization potential of Na would be
numerically the same as
(a) Electron affinity of Na
(b) Electronegativity of Na
(c) Electron affinity of He
(d) ionization potential of Mg
41. What should be the atomic number of
the next halogen if discovered in
future?
(a) 115 (b) 119
(c) 117 (d) 121
42. The electronic configurations for some
neutral atoms are given below: Which
of these is expected to have the highest
second ionization enthalpy?
(a) 2 2 6 2
1 ,2 2 ,3s s p s
(b) 2 2 6 1
1 ,2 2 ,3s s p s
(c) 2 2 6 2 2
1 ,2 2 ,3 3s s p s p
(d) 2 2 6 2 3
1 ,2 2 ,3 3s s p s p
43. The law of triads is applicable to
(a) C, N, O (b) H, O, N
(c) Na, K, Rb (d) Cl, Br, I
44. The law of triads is not applicable on
(a) Cl, Br, I (b) Na, K, Rb
(c) S, Se, Te (d) Ca, Sr, Ba
45. A given compound 2A whose total
A Ad  is
o
1.4 A . The atomic (covalent)
radius of an atom A is
(a)
o
0.7 A (b)
o
0.5 A
(c)
o
0.2 A (d)
o
0.1 A
46. The ionic radius of Cr is minimum in
which of the following compounds?
(a) 3CrF (b) 3CrCl
(c) 2 3Cr O (d) 2 4K CrO
47. Arrange 3 3 3
, ,Ce La Pm 
and 3
Yb 
in
increasing order of their size
(a) 3 3 3 3
Yb Pm Ce La  
  
(b) 3 3 3 3
Ce Yb Pm La  
  
(c) 3 3 3 3
Yb Pm La Ce  
  
(d) 3 3 3 3
Yb Pm La Ce  
  
Direction (Q. No – 48): In the following
question, more than one of the answer given
are correct. Select the correct answer and
mark it according to the following codes:
Codes:
(i) a, b and c are correct
(ii) a and b are correct
(iii) b and d are correct
(iv) a and c are correct

5. 48. Choose the correct order of atomic
radius
(a) Li > Be > B > C > N > O > F
(b) Li < Na < K < Rb < Cs
(c) 2 3 4
Mn Mn Mn Mn  
  
(d) 2
O O O 
 
Directions (Q. No – 49, 50): Read the
passage given below and answer the
questions that follows:
The tendency of an atom to attract shared pair
of electrons towards itself is called
electronegativity. EN and EA both have
tendency to attract electrons but electron
affinity is for isolated atoms, whereas
electronegativity is for bonded atoms.
A polar covalent or ionic bond of A – B may
be broken
as (a) :A B A B 
   (EN A > EN B)
as (a) :A B A B 
   (EN A < EN B)
49. Which of the following compound has
highest value of bond length?
(a) CsF (b) CsBr
(c) CsI (d) CsCl
50. The electronegativities of F and H are
4.0 and 2.1 respectively. The percent
ionic character in H and F bond is
(a) 43 (b) 34
(c) 94 (d) 39
51. Which of the following is not an
actinoid?
(a) Curium (Z = 96)
(b) Californium (Z = 98)
(c) Uranium (Z = 92)
(d)Terbium (Z = 65)
52. Which of the following species has
lowest ionization potential?
(a) O (b) 2O
(c) 2O
(d) 2O
53. The decreasing order of the ionization
potential of the following element is
(a) Ne > Cl > P > S > Al > Mg
(b) Ne > Cl > P > S > Mg > Al
(c) Ne > Cl > S > P > Mg > Al
(d) Ne > Cl > S > P > Al > Mg
54. The radii of , ,F F O
and 2
O 
are in
the order
(a) 2
O F F O 
  
(b) 2
F O F O 
  
(c) 2
O O F F 
  
(d) 2
O F O F 
  
55. Which ionization potential (IP) in the
following equations involves the
greatest amount of energy?
(a) Na Na e 
  (b) 2
K K e  
 
(c) 2 3
C C e  
  (d) 2
Ca Ca e  
 
56. Which of the following arrangements
represents the increasing order
(smallest to largest) of ionic radii of the
given species 2 2 3 3
, , ,O S N P   
?
(a) 2 3 2 3
O N S P   
  
(b) 2 3 3 2
O P N S   
  
(c) 3 2 3 2
N O P S   
  
(d) 3 2 2 3
N S O P   
  
57. Which of the following order is wrong?
(a) 3 3 3NH PH AsH  Acidic
(b) Li < Be < B < C – IE1
(c) 2 3 2 2Al O MgO Na O K O   
basic
(d) Li Na K Cs   
    Ionic
radius
58. Which of the following sequence
correctly represents the decreasing
acidic nature of oxides?
(a) 2 2 3 2 2 3Li O BeO B O CO N O   
(b) 2 3 2 2 3 2N O CO B O BeO Li O   
(c) 2 2 3 2 3 2CO N O B O BeO Li O   
(d) 2 3 2 2 3 2B O CO N O Li O BeO   

6. 59. In which of the following
arrangements, the sequences is not
strictly according to the property
written against it?
(a) 2 2 2 2;CO SiO SnO PbO  
increasing oxidizing power
(b) 3 3 3 3;NH PH AsH SbH  
increasing basic strength
(c) HF < HCl < HBr < HI; increasing
acid strength
(d) B < C < O < N; increasing first
ionization enthalpy
60. The ionic radii
o
in A
 
 
 
of 3 2
,N O 
and
F
are respectively
(a) 1.71, 1.40 and 1.36
(b) 1.71, 1.36 and 1.40
(c) 1.36, 1.40 and 1.71
(d) 1.36, 1.71 and 1.40
61. Amongst 2 2 2, ,H O H S H Se and 2H Te,
the one with the highest boiling point is
(a) 2H Obecause of hydrogen bonding
(b) 2H Te because of higher molecular
weight
(c) 2H S because of hydrogen bonding
(d) 2H Sebecause of lower molecular
weight
62. Match the Column – I and Column – II
and select the correct answer by given
codes.
Column – I (Elements) Column – II
(Properties)
A. 3 2
Li Al Mg K   
   I. EA
(Electron affinity)
B. 3 2
Li Al Mg K   
   II. Ionic radii
C. Cl > F > Br > I III. EN
(Electronegativity)
D. F > Cl > Br > I IV.Effective
nuclear charge
(a) A – II, B – IV, C – III, D – I
(b) A – II, B – IV, C – I, D – III
(c) A – IV, B – II, C – III, D – I
(d) A – IV, B – II, C – I, D – III
63. The Van der Waal and covalent radii of
fluorine atom respectively from the
following figure are
(a) 219pm, 72pm (b) 75pm, 72pm
(c) 147pm, 72pm (d) 147pm, 144pm
64. Cl, Br, I, if this is Dobereiner’s triad
and the atomic masses of Cl and I are
35.5 and 127 respectively the atomic
mass of Br
(a) 162.5 (b) 91.5
(c) 81.25 (d) 45.625
PERIOD, GROUP AND BLOCK
65. 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
66. Elements upto atomic number 112 have
been discovered till now. What will be
the electronic configuration of the
element possessing atomic no. 108:
(a)   14 6 2
5 6 7Rn f d s
(b) 14 8 2
6 7 7f d s
(c)  14 8 0
5 6 7Rn f d s
(d)  14 8 2
4 5 6Xe f d s
67. In 6th
period of the modern periodic
table, electronic energy levels are in the
order:
(a) 6s, 4f, 5d, 6p(b) 6s, 6p, 4f, 5d

7. (c) 4f, 5d, 6s, 6p(d) None
68. The element with atomic number Z =
118 will be:
(a) Noble gas
(b) Transition metal
(c) Alkali metal
(d) Alkaline earth metal
69. The atom having the valence shell
electronic configuration 2 2
4 4s p 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
70. The electronic configuration of d –
block elements is exhibited by
(a)  1 2 1 10
1ns n d 

(b)  2 10
1ns n d
(c)   10 2
1n d s
(d) 2 5
ns np
71. Which of the following electronic
configuration belongs to inert gas
elements:
(a)  2 10
1ns n d (b)  2 2 6
1ns n s p
(c) 2 6
ns np (d) None
72. Total number of p block elements
among given atomic number 83, 79, 42,
64, 37, 54, 34
(a) 3 (b) 4
(c) 5 (d) 6
Zeff, SCREENING CONSTANT &
ATOMIC RADIUS
73. The formula for effective nuclear
charge is (if σ is screening constant)
(a) Z – σ (b) Z + σ
(c) Z σ –1
(d) Z σ
74. Effective nuclear charge in group
generally
(a) Increases down the group
(b) Decreases down the group
(c) Remains constant
(d) First increases than decreases
75. In sodium atom the screening is due to:
(a) 2 6
3 ,3s p (b) 1
2s
(c) 2 2 6
1 ,2 ,2s s p (d) 2 2
1 ,2s s
76. The correct order of size would be
(a) Ni < Pd ~ Pt (b) Pd < Pt < Ni
(c) Pt > Ni > Pd (d) Pd > Pt > Ni
77. Which of the following is not
isoelectronic series
(a) 3
, ,Cl P Ar 
(b) 3 2
, ,N Ne Mg 
(c) 3
, ,B He Li 
(d) 3 2
, ,N S Cl  
78. 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
79. Atomic radii of Fluorine and Neon in
Angstrom units are given by
(a) 0.72, 1.60 (b) 1.60, 1.60
(c) 0.72, 0.72 (d) None of these
80. Which of the following has largest
radius:
(a) 2 2 6 2
1 2 2 3s s p s
(b) 2 2 6 2 1
1 2 2 3 3s s p s p
(c) 2 2 6 3
1 2 2 3s s p p
(d) 2 2 6 2 5
1 2 2 3 3s s p s p
81. Correct order of ionic radii is
(a) 4 7
Ti Mn 
 (b) 35 37
Cl Cl 

(c) K Cl 
 (d) 3 5
P P 

82. The radius of potassium atom is 0.203
nm. The radius of the potassium ion in
nanometer will be
(a) 0.133 (b) 0.231
(c) 0.234 (d) 0.251
83. 2
S
is not isoelectronic with

8. (a) Ar (b) Cl
(c) HS
(d) 3
Ti
84. Maximum size of first member of a
period is due to
(a) Maximum number of shells
(b) Maximum screening effect
(c) Minimum Zeff
(d) All
85. In which of the following pair radii of
second species is smaller than that of
first species?
(a) Li, Na (b) ,Na F 
(c) 3 3
,N Al 
(d) 7 4
,Mn Mn 
86. Spot the incorrect order of atomic radii:
(a) Cu Znr  (b) Cl Fr 
(c) P Sr  (d) Sc Tir 
87. 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
(a) All (b) A, B
(c) B, C (d) B, D
89. Decreasing order of size of ions is:
(a) 2 3
Br S Cl N   
  
(b) 3 2
N S Cl Br   
  
(c) 2 3
Br Cl S N   
  
(d) 3 2
N Cl S Br   
  
90. The covalent and Vander Waals radii of
hydrogen respectively are
(a) 0.37
o
A , 0.8
o
A
(b) 0.37
o
A , 0.37
o
A
(c) 0.8
o
A , 0.8
o
A
(d) 0.8
o
A , 0.37
o
A
91. Which of the following sequence is
correct for decreasing order of ionic
radius
(a) 2 2
, , , ,Se I Br O F    
(b) 2 2
, , , ,I Se O Br F    
(c) 2 2
, , , ,Se I Br F O    
(d) 2 2
, , , ,I Se Br O F    
92. Incorrect order of ionic radius is
(a) 3 3 3 3
La Gd Eu Lu   
  
(b) 2 3 4 5
V V V V   
  
(c) 2 3
ln Sn Sb  
 
(d) 3 5 7
K Sc V Mn   
  
IONISATION POTENTIAL
93. Correct order of Ist 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
94. 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
95. A sudden large jump between the
values of 2nd
and 3rd
IP of an element
would be associated with the electronic
configuration:
(a) 2 2 6 1
1 ,2 2 ,3s s p s
(b) 2 2 6 2 5
1 ,2 2 ,3 3s s p s p
(c) 2 2 6 2 5
1 ,2 2 ,3 3s s p s p
(d) 2 2 6 2
1 ,2 2 ,3s s p s
96. Compared to the first ionisation
potential, the value of second
ionization potential of an element is
(a) Negligible (b) Smaller
(c) Greater (d) Double
97. In which of the following pairs, the
ionization energy of the first species is
less than that of the second:

9. (a) ,O O
(b) ,S P
(c) N, P (d) ,Be Be
98. The correct order of stability of
2 3
, ,Al Al Al  
is
(a) 3 2
Al Al Al  
 
(b) 2 3
Al Al Al  
 
(c) 2 3
Al Al Al  
 
(d) 3 2
Al Al Al  
 
99. Minimum first ionisation energy is
shown by which electronic
configuration
(a) 2 2 5
1 2 2s s p
(b) 2 2 6 2 2
1 2 2 3 3s s p s p
(c) 2 2 6 1
1 2 2 3s s p s
(d) 2 2 6
1 2 2s s p
100. Successive ionization energies of an
element ‘X’ are given below (in
K. cal)
1IP 2IP 3IP 4IP
165 195 556 595
Electronic configuration of the element
‘X’ is:
(a) 2 2 6 2 2
1 ,2 2 ,3 3s s p s p
(b) 2 1
1 ,2s s
(c) 2 2 2
1 ,2 2s s p
(d) 2 2 6 2
1 ,2 2 ,3s s p s
101. The correct order of decreasing first
ionization energy is
(a) Si > Al > Mg > Na
(b) Si > Mg > Al > Na
(c) Al > Si > Mg > Na
(d) Mg > Li > Al > Si
102. The strongest reducing agent among
the following us:
(a) Na (b) Mg
(c) Al (d) K
103. Which ionisation potential (IP) in the
following equations involves the
greatest amount of energy
(a) 2
K K e  
 
(b) 2
Li Li e  
 
(c) Fe Fe e 
 
(d) 2
Ca Ca e  
 
104. The correct values of ionisation
energies (in kJ 1
mol
) of Be, Ne, He
and N respectively are
(a) 786, 1012,999, 1256
(b) 1012, 786, 999, 1256
(c) 786, 1012, 1256, 999
(d) 786, 999, 1012, 1256
ELECTRON AFFINITY
105. In which case the energy released is
minimum?
(a) Cl Cl
 (b) B B

(c) N N
 (d) C C

106. Process in which maximum energy is
released?
(a) 2
O O
 (b) 2
Mg Mg 

(c) Cl Cl
 (d) F F

107. Which of the following is energy
releasing process
(a)  X X g e 
 
(b)   2
O g e O  
 
(c)    O g O g e 
 
(d)    O g e O g 
 
108. In which of the following process
energy is liberated:
(a) Cl Cl e
 
(b) HCl H Cl 
 
(c) Cl e Cl
 
(d) 2
O e O 
 
109. Element of which atomic number has
highest electron affinity

10. (a)35 (b) 17
(c) 9 (d) 53
110. 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
111. Which of the following element will
form most stable bivalent anion
(a) 2 0
2 2s p (b) 2 2
2 2s p
(c) 2 3
2 2s p (d) 2 1
2 2s p
112. The correct set of decreasing order of
electronegativity is
(a) Li, H, Na (b) Na, H, Li
(c) H, Li, Na (d) Li, Na, H
113. The pair with minimum difference in
electronegativity is
(a) F, Cl (b) C, H
(c) P, H (d) Na, Cs
114. 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
115. Electronegativity of an element can be
measured using:
(a) Pauling’s scale
(b) Mulliken’s scale
(c) Both
(d) None
116. The electronegativities of the following
elements: H, O, F, S and Cl increase in
the order
(a) H < O < F < S < Cl
(b) Cl < H < O < F < S
(c) H < S < O < Cl < F
(d) H < S < Cl < O < F
117. Which of the following is different
from other three oxides
(a) MgO (b) SnO
(c) PbO (d) ZnO
118. Which of the following diagrams is
correctly related to electron affinity of
halogens
(a)
(b)
(c)
(d)
119. Elements of which group form anions
most readily?
(a) Oxygen family
(b) Nitrogen group
(c) Halogens
(d) Alkali metals
120. Which is the weakest base among
NaOH,  2
Ca OH , KOH and
 2
Zn OH
(a) NaOH (b) KOH
(c)  2
Ca OH (d)  2
Zn OH
121. If electronegativity values of element X
and Y are 3.8 and 1.8 respectively, then
percentage of ionic character in
compound XY is:
(a) 50 (b) 46
(c) 64 (d) 36
122. The outer electron configuration of Gd
(Atomic No: 64) is
(a) 4 4 2
4 5 6f d s (b) 7 1 2
4 5 6f d s
(c) 3 5 2
4 5 6f d s (d) 8 0 2
4 5 6f d s

11. 123. The correct order of electron gain
enthalpy with negative sign of F, Cl, Be
and I, having atomic number 9, 17, 35
and 53 respectively, is
(a) I > Br > Cl > F
(b) F > Cl > Br > I
(c) Cl > F > Br > I
(d) Br > Cl > I > F
124. For electron affinity of halogens which
of the following is correct?
(a) Br > F (b) F > Cl
(c) Br > Cl (d) F > I
125. The pair of amphoteric hydroxide is
(a)  3
,Al OH LiOH
(b)    2 2
,Be OH Mg OH
(c)    3 2
,Be OH Be OH
(d)    2 2
,Be OH Zn OH
126. Identify the least stable ion amongst the
following
(a) Li
(b) Be
(c) B
(d) C
127. Amongst Be, B, Mg and Al, the second
ionization potential is maximum for
(a) B (b) Be
(c) Mg (d) Al
128. In the 3rd
period, the first ionization
potential is of the order?
(a) Na > Mg > Al > Si > P
(b) Mg > Na > Si > P > Al
(c) Na < Mg < Al < Si < P
(d) Na < Al < Mg < Si < P
129. The size of ionic species is correctly
given in order?
(a) 7 4 2
Cl Si Mg Na   
  
(b) 2 4 7
Na Mg Si Cl   
  
(c) 2 7 4
Na Mg Cl Si   
  
(d) 7 2 4
Cl Na Mg Si   
  
130. Which one of the following statements
is false?
(a) The electron affinity of chlorine is
less than that of fluorine
(b) The electronegativity of fluorine is
more than that of chlorine
(c) The electron affinity of bromine is
less than that of chlorine
(d) The electronegativity of chlorine is
more than that of bromine.
131. The set representing the correct order
for first ionization potential is
(a) K > Na > Li (b) Be > Mg > Ca
(c)B > C > N (d) Ge > Si > C

12. Answer Keys
1. (a) 2. (c) 3. (d) 4. (b) 5. (b) 6. (c) 7. (b)
8. (c) 9. (d) 10. (c) 11. (d) 12. (b) 13. (a) 14. (b)
15. (a) 16. (b) 17. (b) 18. (a) 19. (a) 20. (a) 21. (c)
22. (b) 23. (d) 24. (b) 25. (a) 26. (b) 27. (a) 28. (d)
29. (a) 30. (b) 31. (b) 32. (b) 33. (a) 34. (b) 35. (a)
36. (d) 37. (c) 38. (b) 39. (c) 40. (a) 41. (c) 42. (b)
43. (d) 44. (b) 45. (a) 46. (d) 47. (a) 48. (a) 49. (c)
50. (a) 51. (d) 52. (d) 53. (b) 54. (d) 55. (b) 56. (a)
57. (b) 58. (b) 59. (b) 60. (a) 61. (a) 62. (b) 63. (c)
64. (c) 65. (b) 66. (a) 67. (a) 68. (a) 69. (c) 70. (a)
71. (a) 72. (c) 73. (a) 74. (a) 75. (c) 76. (c) 77. (a)
78. (d) 79. (c) 80. (a) 81. (a) 82. (d) 83. (a) 84. (d)
85. (c) 86. (c) 87. (a) 88. (c) 89. (a) 90. (a) 91. (d)
92. (a) 93. (d) 94. (a) 95. (d) 96. (c) 97. (b) 98. (d)
99. (c) 100. (d) 101. (b) 102. (d) 103. (b) 104. (c) 105. (c)
106. (c) 107. (d) 108. (c) 109. (b) 110. (c) 111. (b) 112. (c)
113. (c) 114. (b) 115. (c) 116. (d) 117. (a) 118.(c) 119. (c)
120. (d) 121. (b) 122. (b) 123. (c) 124. (d) 125. (d) 126. (b)
127. (a) 128. (d) 129. (b) 130. (a) 131. (b)