Questions
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
Answer:5 sigma (s) and 1 pi (p) bonds
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+?
Answer:K+ < Ca2+ < Mg2+ < Be2+
6
Among the following mixtures, dipole-dipole as the major interaction, is present in
Answer: acetonitrile and acetone
7
Dipole-induced dipole interactions are present in which of the following pairs?
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?
Answer:NaCl
9
The number of types of bonds between two carbon atoms in calcium carbide is
Answer: One sigma, two pi
10
The maximum number of hydrogen bonds that a molecule of water can have is
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
Answer:A2B3
12
Which of the following types of hybridisation leads to three dimensional geometry of bonds around the carbon atom?
Answer:sp²
14
Among the following mixtures, dipole-dipole as the major interaction, is present in
Answer: acetonitrile and acetone
15
Among the following the maximum covalent character is shown by the compound
Answer:AlCl3
17
Which one of the following does not have sp² hybridised carbon?
Answer:Acetonitrile
19
The number of nodal planes present in s × s antibonding orbitals is
Answer:1
20
The bond length between hybridised carbon atom and other carbon atom is minimum in
Answer:Propyne
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