Chemical Bonding And Molecular Structure Worksheet With Answer Key
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63. CHEMICAL BONDING AND MOLECULAR STRUCTURE
PREVIOUS EAMCET BITS
1.
The bond length of HCl molecule is 1.275A° and its dipole moment is 1.03 D. The ionic
character of the molecule (in percent) (charge of electron 4.8 × 10
–10
esu) is
[ 2008 E]
1) 100
2) 67.3
3) 33.6
4) 16.83
Ans: 1
μ
exp erimental
×
100
μ
Sol: % of ionic character =
theoritical
−
−
×
×
×
×
10
8
μ experimental = e d
4.8 10 esu 1.275 10 cm
=
=
×
−
18
6.12 10 esu cm
=6.12 D
santhoshiμ theoretical = 1.03D
1.03
×
=
100 16.83
∴ % of ionic character =
6.12
2.
Match the following
[ 2008 M]
List – I
List – II
A) BCl
i) Linear
3
−
2
Br
B) Pd
ii) Planar triangular
4
SF
C)
iii) Tetrahedral
6
−
I
D)
iv) Octahedral
3
v) Square planar
The correct answer
A
B
C
D
A
B
C
D
1)
ii
iii
iv
i
2)
v
iii
ii
i
3)
ii
v
iv
i
4)
v
iv
iii
ii
Ans: 3
Sol: Match the following
(A) BCl
= Planar triangular (ii)
3
−
2
Pd Br
(B)
= square planar (v)
4
(C) SF
= Octahedral (iv)
6
−
I
(D)
= linear (i)
3
3.
The decreasing order of bond dissociation energy of C – C , C – H and H – H bond is
[ 2007 E ]
−
> −
> −
−
>
−
>
−
1) H H C H C C
2) C C C H H H
− −
>
−
>
−
−
>
−
>
−
3) C H C C H H
4) C C H H C H
Ans: 1
−
>
−
>
−
Sol: The decreasing order of bond dissociation energies are H H C H C C
4.
Which of the following is not tetrahedral
[ 2007 ]
−
−
+
2
−
CO
2
BF
NH
SO
1)
2)
3)
4)
3
4
4
4
1
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