Chemical Bonding And Molecular Structure Worksheet With Answer Key Page 5
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6Chemical Bonding and molecular structure
22.
Which one of the following molecule contains both ionic and covalent bonds?
(2002-E)
CH Cl 2.
K SO 3.
BeCl
SO
1.
4.
2
2
2
4
2
2
Ans: 2
+
−
⎯⎯ →
+
2
K SO
2K
SO
Sol.
2
4
4
−
2
⎡
⎤
O
⎢
⎥
||
⎢
⎥
−
=
− −
2
SO
O S O
4
⎢
⎥
||
⎢
⎥
⎣
O
⎦
−
2
SO
+
In between K
and
ionic bond is present.
4
−
2
SO
In
covalent bonds are present.
4
+
NH
23.
What is the hybridisation state of the central atom in the conjugate base of
ion?
(2002-E)
4
3
2
2
1. sp
2. sp
3. sp
4. dsp
Ans: 2
+
NH , hybridization is sp
NH
3
Sol. Conjugate base of
is
3
4
24.
Which of the following statement is true?
(2001E)
1. Hybridisation of the central atom in NH
and CH
is SP
3
4
2
2. BeCl
has “V” shape while SO
is linear
2
2
SF is octahedral and F – S – F bond angle is 90
3.
6
0
CO has dipole moment
4.
2
Ans: 3
SF . S atom undergoes sp
3
2
Sol. In
d
hybridisation and shape of the molecule is octahedraon and bond
6
angle is 90°.
25.
In which of the following substance, hydrogen bonding is absent?
(2001 M)
1. HF
2. H
O
3. CCl
4. Salicylaldehyde
2
4
Ans: 3
Sol. In CCl
there is no hydrogen bond.
4
26.
Acetylene has….bonds
(2001 M)
1. 2σ, 2π
2. 2σ, 3π
3. 3σ, 2π
4. 3σ, 3π
Ans: 3
− ≡ −
Sol. H C C H
In acetylene 3σ and 2π bonds are present
27.
Which of the following has the lowest bond angle?
(2000 E)
1. H
O
2. CH
3. H
S
4. NH
2
4
2
3
Ans: 3
=
°
H O 104.5
Sol.
2
=
°
1
CH
109 28
4
=
°
NH
107
3
=
°
1
H S 92 30
2
5
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