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CBSE
Class 11 Chemistry
Chemical Bonding And Molecular Structure
Quiz 1
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The bond length between hybridised carbon atom and other carbon atom is minimum in
0%
Propane
0%
Butane
0%
Propene
0%
Propyne
Explanation
Propyne
The number of nodal planes present in s × s antibonding orbitals is
0%
1
0%
2
0%
0
0%
3
Explanation
1
The hybrid state of sulphur in SO
0%
sp²
0%
sp³
0%
sp
0%
sp³d
Explanation
sp²
Which one of the following does not have sp² hybridised carbon?
0%
Acetone
0%
Acetic acid
0%
Acetonitrile
0%
Acetamide
Explanation
Acetonitrile
Which of the following will have the lowest boiling point?
0%
2-MethylButane
0%
2-MethylPropane
0%
2,2-Dimethylpropane
0%
n-Pentane
Explanation
n-Pentane
Among the following the maximum covalent character is shown by the compound
0%
MgCl
0%
FeCl
0%
SnCl
0%
AlCl
Explanation
AlCl
Among the following mixtures, dipole-dipole as the major interaction, is present in
0%
benzene and ethanol
0%
acetonitrile and acetone
0%
KCl and water
0%
benzene and carbon tetrachloride
Explanation
acetonitrile and acetone
The value of n in the molecular formula Be Al Si O is
0%
3
0%
5
0%
7
0%
9
Explanation
3
Which of the following types of hybridisation leads to three dimensional geometry of bonds around the carbon atom?
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sp
0%
sp²
0%
sp³
0%
None of these
Explanation
sp²
The maximum number of hydrogen bonds that a molecule of water can have is
0%
1
0%
2
0%
3
0%
4
Explanation
4
The number of types of bonds between two carbon atoms in calcium carbide is
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Two sigma, two pi
0%
One sigma, two pi
0%
One sigma, one pi
0%
Two sigma, one pi
Explanation
One sigma, two pi
Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?
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RbCl
0%
KCl
0%
NaCl
0%
LiCl
Explanation
NaCl
Dipole-induced dipole interactions are present in which of the following pairs?
0%
H
0%
Cl
0%
HCl and He atoms
0%
SiF
Explanation
HCl and He atoms
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, Mg, Be?
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Ca< Mg< Be< K
0%
Mg< Be< K< Ca
0%
Be< K< Ca< Mg
0%
K< Ca< Mg< Be
Explanation
K< Ca< Mg< Be
The species having pyramidal shape is
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SO
3
0%
BrF
3
0%
SiO
3
2-
0%
OSF
2
Explanation
(d) OSF
2
Explanation: The species having a pyramidal shape according to VSEPR theory is OSF2. The central S atom has 3 bonding domains (one S = O double bond and two S−F single bonds) and one lone pair of electrons. The electron pair geometry is tetrahedral and molecular geometry is pyramidal. This is similar to the ammonia molecule.
The structure of IF
0%
Pentagonal bipyramid
0%
Square pyramid
0%
Trigonal bipyramid
0%
Octahedral
Explanation
Pentagonal bipyramid
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
0%
1 sigma (s) and 2 pi (p) bonds
0%
3 sigma (s) and 2 pi (p) bonds
0%
4 sigma (s) and 1 pi (p) bonds
0%
5 sigma (s) and 1 pi (p) bonds
Explanation
5 sigma (s) and 1 pi (p) bonds
Which of the following is a linear molecule?
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ClO
0%
CO
0%
NO
0%
SO
Explanation
CO
0 h : 0 m : 1 s
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