Chemical Bonding And Molecular Structure Worksheet With Answer Key Page 6
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6Chemical Bonding and molecular structure
28.
Which of the following hydrocarbon has least carbon-carbon bond length?
(2000 E)
1. C
H
2. C
H
3. C
H
4. C
H
2
6
2
4
6
6
2
2
Ans: 4
=
°
C H
1.54 A
Sol. C – C bond length in
2
6
=
°
C H
1.34 A
C – C bond length in
2
4
=
°
C H
1.39 A
C – C bond length in
6
6
=
°
C H
1.20 A
C – C bond length in
2
2
29.
Which of the following is correct pair?
(2000 E)
1. BeCl
, linear
2. NH
linear
3. CO
, tetrahedral
4. BF
,octahedral
2
3,
2
3
Ans: 1
BeCl is linear
Sol.
2
30.
What is the crystal structure of Cesium Chloride?
(2000 E)
1. Body centered cubic
2. face centered cubic
3. tetrahedral
4. octahedral
Ans: 1
Sol. The crystal structure of CsCl is body centred cubic
31.
Which of the following has least bond energy?
(2000 M)
1. F
2. H
3. N
4. O
2
2
2
2
Ans: 1
Sol. F
has least bond dissociation energy .
2
32.
Which of the following has the lowest boiling point?
(2000 M)
1. CH
2. H
O
3. HF 4. C
H
OH
4
2
2
5
Ans: 1
Sol. CH
has less boiling point due to the absence of hydrogen bond.
4
6
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