Chemical Bonding And Molecular Structure Worksheet With Answer Key Page 3
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6Chemical Bonding and molecular structure
11.
Which of the following statement is correct?
(2005-E)
SF is 12.
1. The number of electrons present in the valency shell of S in
6
2. The rates of ionic reactions are very slow.
SnCl is the linear molecule.
3. According to VSEPR theory,
2
+
+
2
,
+
3
Na Mg
Al
4. The correct order of ability to form ionic compounds among
and
is
+
>
+
>
+
3
2
Al
Mg
Na
F
Ans: 1
x
Sol:
F
x
x
F
S
x
F
x
F
x
F
In SF
s atom has 12 valence electron
6
12.
Which of the following is not correct regarding the properties of ionic compounds
(2004-E)
1. Ionic compounds have high melting and boiling points.
2. Their reaction velocity in aqueous medium is very high.
3. Ionic compounds in their molten and aqueous solutions do not conduct electricity.
4. They are highly soluble in polar solvents.
Ans: 3
Sol: Ionic compounds in their molten state and aqueous solution conducts electricity hence (3).
Is the wrong answer.
13.
Which of the following statement is not correct
(2004-M)
1. One of the favourable conditions for the formation of cation is low ionisation potential.
2. Co-ordintion number of Cs in CsCl is 8
3. Ionic bond is directional.
4. Ionic compounds have high melting and boiling points.
Ans: 3
Sol: Ionic bond is non directional
∴ (3) in the wrong answer
14.
If the boiling point of ethanol (molecular weight -46) is 78°C. What is the boiling point of diethyl
ether (molecular weight=74)?
(2004-M)
0
0
0
0
100 C
78 C
86 C
34 C
1.
2.
3.
4.
Ans: 4
Sol: Alcohols have high boiling point than ethers due to the presence of intermolecular hydrogen
bond.
15.
Which one of the following is a correct set?
(2003-E)
3
2
,
,
H O sp , angular
H O sp , linear
1.
2.
2
2
+
2
2
,
,
NH dsp
CH dsp , tetrahedral
3.
, square planar
4.
4
4
Ans: 1
3
Sol. In H
O oxygen atom undergoes sp
hybridisation shape of the molecule is angular due to
2
repulsion between lone pairs of electron hence (1) is correct.
0
16.
If the bond length and dipole moment of a diatomic molecule are 1.25
A and 1.0 D respectively,
what is the percent ionic character of the bond?
(2003-E)
1. 10.66
2. 12.33
3. 16.66
4. 19.33
Ans: 3
3
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