Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQ Questions With Answers

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Questions
1 Which of the following is a linear molecule?
A ClO2
B CO2
C NO2
D SO2

Answer:CO2
2 The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent sp² orbitals. The total number of sigma (s) and pi (p) bonds in ethene molecule is
A 1 sigma (s) and 2 pi (p) bonds
B 3 sigma (s) and 2 pi (p) bonds
C 4 sigma (s) and 1 pi (p) bonds
D 5 sigma (s) and 1 pi (p) bonds

Answer:5 sigma (s) and 1 pi (p) bonds
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3 The structure of IF7 is
A Pentagonal bipyramid
B Square pyramid
C Trigonal bipyramid
D Octahedral

Answer:Pentagonal bipyramid
4 The species having pyramidal shape is
A SO3
B BrF3
C SiO32-
D OSF2

Answer:OSF2
5 The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing order of the polarizing power of the cationic species, K+, Ca++, Mg2+, Be2+?
A Ca2+ < Mg2+ < Be+ < K+
B Mg2+ < Be2+ < K+ < Ca2+
C Be2+ < K+ < Ca2+ < Mg2+
D K+ < Ca2+ < Mg2+ < Be2+

Answer:K+ < Ca2+ < Mg2+ < Be2+
6 Among the following mixtures, dipole-dipole as the major interaction, is present in
A benzene and ethanol
B acetonitrile and acetone
C KCl and water
D benzene and carbon tetrachloride

Answer: acetonitrile and acetone
7 Dipole-induced dipole interactions are present in which of the following pairs?
A H2O and alcohol
B Cl2 and CCl4
C HCl and He atoms
D SiF4 and He atoms

Answer:HCl and He atoms
8 Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?
A RbCl
B KCl
C NaCl
D LiCl

Answer:NaCl
9 The number of types of bonds between two carbon atoms in calcium carbide is
A Two sigma, two pi
B One sigma, two pi
C One sigma, one pi
D Two sigma, one pi

Answer: One sigma, two pi
10 The maximum number of hydrogen bonds that a molecule of water can have is
A 1
B 2
C 3
D 4

Answer:4
11 An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be
A A3B6
B A2B3
C A3B2
D A2B

Answer:A2B3
12 Which of the following types of hybridisation leads to three dimensional geometry of bonds around the carbon atom?
A sp
B sp²
C sp³
D None of these

Answer:sp²
13 The value of n in the molecular formula BenAl2Si6O18 is
A 3
B 5
C 7
D 9

Answer:3
14 Among the following mixtures, dipole-dipole as the major interaction, is present in
A benzene and ethanol
B acetonitrile and acetone
C KCl and water
D benzene and carbon tetrachloride

Answer: acetonitrile and acetone
15 Among the following the maximum covalent character is shown by the compound
A MgCl2
B FeCl2
C SnCl2
D AlCl3

Answer:AlCl3
16 Which of the following will have the lowest boiling point?
A 2-MethylButane
B 2-MethylPropane
C 2,2-Dimethylpropane
D n-Pentane

Answer:n-Pentane
17 Which one of the following does not have sp² hybridised carbon?
A Acetone
B Acetic acid
C Acetonitrile
D Acetamide

Answer:Acetonitrile
18 The hybrid state of sulphur in SO2 molecule is :
A sp²
B sp³
C sp
D sp³d

Answer: sp²
19 The number of nodal planes present in s × s antibonding orbitals is
A 1
B 2
C 0
D 3

Answer:1
20 The bond length between hybridised carbon atom and other carbon atom is minimum in
A Propane
B Butane
C Propene
D Propyne

Answer:Propyne

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