Chemical Bonding and Molecular Structure: MCQs | Question – Paper 5

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Topic: Chemical Bonding and Molecular Structure, Test No.: 05, Total MCQs: 10

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Question 1
Which of the following contains maximum number of lone pairs on the central atom?
A
ClO3−
B
XeF4
C
SF4
D
I3−
Question 2
Which one of the following species is diamagnetic in nature?
A
He2+
B
H2
C
H2+
D
H2−
Question 3
Number of lone pair(s) in XeOF4 is/are
A
0
B
1
C
2
D
3
Question 4
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively:
A
sp2 and sp2
B
sp2 and sp3
C
sp3 and sp2
D
sp3 and sp3
Question 5
Which one of the following does not have sp2 hybridised carbon?
A
Acetone
B
Acetic acid
C
Acetonitrile
D
Acetamide
Question 6
If the bond length and dipole moment of a diatomic molecule are 1.25 A and 1.0 D respectively, what is the percent ionic character of the bond?
A
10.66
B
12.33
C
16.66
D
19.33
Question 7
The bond length of HCl molecule is 1.275A° and its dipole moment is 1.03 D. The ionic character of the molecule (in percent) (charge of electron 4.8 × 10–10 esu) is
A
100
B
67.3
C
33.6
D
16.83
Question 8
Lattice energy of an ionic compound depends upon
A
Size of the ion only
B
Charge on the ion only
C
Charge on the ion and size of the ion
D
Packing of ions only
Question 9
The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is:
A
H2S < SiH4 < NH3 < BF3
B
NH3 < H2S < SiH4 < BF3
C
H2S < NH3 < SiH4 < BF3
D
H2S < NH3 < BF3 < SiH4
Question 10
According to MO Theory,
A
O2+ is paramagnetic and bond order greater than O2
B
O2+ is paramagnetic and bond order less than O2
C
O2+ is diamagnetic and bond order is less than O2
D
O2+ is diamagnetic and bond order is more than O2
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