Chemical Bonding MCQs | Chemical Bonding Multiple Choice Questions(MCQs) & Answers

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Questions
1 Which of the following would have a permanent dipole moment ?
A BF3
B SiF4
C SF4
D XeF4

Answer: SF4
2 In the case of alkali metals, the covalent character decreases in the order
A MCl > MI > MBr > MF
B MF > MCl > MBr > MI
C MF > MCl > MI > MBr
D MI > MBr > MCl > MF

Answer: MI > MBr > MCl > MF
3 Which one of the following species does not exist under normal conditions ?
A Be+2
B Be2
C B2
D Li2

Answer: Be2
4 In a regular octahedral molecule, MX6 the number of X-M-X bonds at 180° is
A 3
B 2
C 6
D 4

Answer: 3
5 The angular shape of ozone molecule (O3) consists of
A 1 sigma and 2 pi-bonds
B 2 sigma and 2 pi-bonds
C 1 sigma and 1 pi-bonds
D 2 sigma and 1 pi-bonds

Answer: 2 sigma and 1 pi-bonds
6 The correct order of increasing bond angles in the following species is
A Cl2O < ClO2 < ClO−2
B ClO2 < Cl2O < ClO−2
C Cl2O < ClO−2< ClO2
D ClO−2 < ClO2 < Cl2O

Answer: Cl2O < ClO−2< ClO2
7 Which of the following has p bonding ?
A NO−3
B SO2−3
C BO3−3
D CO2−3

Answer: SO2−3
8 According to molecular orbital theory which of the following lists rank the nitrogen species in terms of increasing bond order ?
A N−2 < N2 < N2−2
B N2−2 < N−2 < N2
C N2 < N2−2 < N−2
D N−2 < N2−2 < N2

Answer: N2−2 < N−2 < N2
9 In which of the following molecules/ions BF3, NO2-,NH2- and H20, the central atom is sp2 hybridised?
A NO2- and NH2-
B NH2- and H20
C NO2- and H20
D BF3 and NO2-

Answer: BF3 and NO2-
10 Which one of the following is planar ?
A XeF4
B XeO4
C XeO3F
D XeO3F2

Answer: XeF4
11 In PO3−4 ion, the formal charge on each oxygen atom and P-O bond order respectively are
A -0.75, 0.6
B -0.75, 1.0
C -0.75, 1.25
D -3.1, 1.25

Answer: -0.75, 1.25
12 The correct order of increasing bond angles in the following triatomic species is
A NO2- < NO2+ < NO2
B NO2- < NO2 < NO2+
C NO2+ < NO2 < NO2-
D NO2+ < NO2- < NO2

Answer: NO2- < NO2 < NO2+
13 Equilateral shape has
A sp hybridisation
B sp2 hybridisation
C sp3 hybridisation
D dsp2 hybridisation

Answer: sp2 hybridisation
14 AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are
A dx2−y2, dz2, s, px, py
B dxy, s,px, py, pz
C s, px, py, pz, dxy
D dx2−y2, s, px, py, pz

Answer: s, px, py, pz, dxy
15 Overlap of which of the following atomic orbitals would be maximum to form the strongest covalent bond.
A 1s-2s (σ)
B 1s-2p (σ)
C 2p-2p (π)
D 2p-2p (σ)

Answer: 1s-2p (σ)
16 which of the following gas is least polarizable ?
A He
B Ne
C Kr
D Xe

Answer: He
17 Which of the following statements is correct for compound HgCl2, SnCl2 and F2O have
A all have linear shape
B HgCl2 and SnCl2 are linear and HgCl2 is V-shaped
C HgCl2 is linear while SnCl2 and F2O are V-shaped
D none of these

Answer: HgCl2 is linear while SnCl2 and F2O are V-shaped
18 The correct order of increasing bond angle order is
A NH−2>NH3 >NH+4
B NH+4>NH3 >NH−2
C NH3>NH−2 >NH+4
D NH3>NH+4 >NH−2

Answer: NH+4>NH3 >NH−2
19 Species in which central atom is sp2 hybridised
A (CH3)3N
B (SiH3)3N
C (SiO2)n
D NH3

Answer: (SiH3)3N
20 The number of sigma bonds in P4O10 is
A 6
B 16
C 20
D 7

Answer: 16

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