Chemical Bonding and Molecular Structure: MCQs | Question – Paper 4 1

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Topic: Chemical Bonding and Molecular Structure, Test No.: 04, Total MCQs: 10

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Question 1
The species having bond order different from that in CO is
A
NO−
B
NO+
C
CN−
D
N2
Question 2
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
A
C2 → C2+
B
NO → NO+
C
O2 → O2+
D
N2 → N2+
Question 3
Which of the following hydrogen bonds is the strongest?
A
O − H ··· N
B
F − H ··· F
C
O − H ··· O
D
O − H ··· F
Question 4
Which of the following species exhibits the diamagnetic behaviour?
A
O22−
B
O2+
C
O2
D
NO
Question 5

(I) 1, 2-dihydroxy benzene

(II) 1, 3-dihydroxy benzene

(III) 1, 4-dihydroxy benzene

(IV) Hydroxy benzene

The increasing order of boiling points of above mentioned alcohols is

A
I < II < III < IV
B
I < II < IV < III
C
IV < I < II < III
D
IV < II < I < III
Question 6
Which of the following is a favorable factor for cation formation?
A
Low ionisation potential
B
High electron affinity
C
High electronegativity
D
Small atomic size
Question 7
Which of the following is a linear molecule?
A
BeCl2
B
H2O
C
SO2
D
CH4
Question 8
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+, Ca2+, Mg2+, Be2+?
A
Mg2+, Be2+, K+, Ca2+
B
Be2+, K+, Ca2+, Mg2+
C
K+, Ca2+, Mg2+, Be2+
D
Ca2+, Mg2+, Be2+, K+
Question 9
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
Question 10

A molecule (X) has

(i) four sigma bonds formed by the overlap of sp2 and s orbital.

(ii) one sigma bond formed by sp2 and sp2 orbitals and

(iii) one p bonds is formed by Px and Px orbitals.

Which of the following is X?

A
C2 H6
B
C2 H3 Cl
C
C2 H2 Cl2
D
C2 H4
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