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CBSE Questions for Class 11 Medical Chemistry Hydrogen Quiz 14 - MCQExams.com
CBSE
Class 11 Medical Chemistry
Hydrogen
Quiz 14
Last traces of water is removed from
H
2
O
2
by?
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0%
electrolysis
0%
crystallisation
0%
condensation
0%
evaporation
Select the incorrect statement from the following:
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0%
H
+
can exist as
H
9
O
+
4
in water.
0%
H
2
is thermally stable.
0%
Ionisation of
C
H
3
C
O
O
H
is slower than that of
C
H
3
C
O
O
D
0%
Kinetic isotopic effect is observed when there is retardation in the rate if
H
2
O
is replaced by
D
2
O
By which of the following methods,
H
2
O
2
can't be synthesised ?
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0%
Lewis addition of ice cold
H
2
S
O
4
on
B
a
O
2
0%
Addition of ice cold
H
2
S
O
4
and
P
b
O
2
0%
Aerial oxidation of
2
-ethyl anthraquinol
0%
Electrolysis of
(
N
H
4
)
2
S
O
4
at a high current density
Explanation
H
2
S
O
4
+
P
b
O
2
→
P
b
S
O
4
↓
+
1
2
O
2
+
H
2
O
(
P
b
O
2
is not peroxy compound)
H
2
S
O
4
+
B
a
O
2
→
B
a
S
O
4
↓
+
H
2
O
2
(
N
H
4
)
2
S
O
4
⇋
2
N
H
+
4
+
S
O
2
−
4
At anode :
2
S
O
2
−
4
E
l
e
c
t
r
o
l
y
s
i
s
→
S
2
O
2
−
8
+
2
e
−
Peroxo sulphate on hydrolysis, produces
H
2
O
2
.
Hence, Option "B" is the correct answer.
State true or false:
The rapid cooking in pressure cookers is based upon the principle that boiling point of water increases with increase in pressure.
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0%
True
0%
False
Complete hydrolysis of one mole of peroxydisulphuric acid gives one mole of
H
2
O
2
and two moles of
H
2
S
O
4
.
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0%
True
0%
False
Explanation
Complete hydrolysis of one mole of peroxydisulphuric
acid gives one mole
H
2
O
2
& two mole of
H
2
S
O
4
, this
Process is prepnation of
H
2
O
2
H
2
S
2
O
8
(
a
a
)
Hydrolysis
⟶
2
H
2
S
O
4
+
H
2
O
2
(
a
a
)
Hence, given statement is correct (true).
Water cannot be used to extinguish the petrol fire.
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0%
True
0%
False
Explanation
Being lighter petrol floats over water. So,
Water cannot be used to extinguish the petrol fire.
Hence, the given statement is True.
Statement - 1: Dihedral angle of
H
2
O
2
in gaseous state is
90
∘
.
Statement - 2: Dihedral angle of
H
2
O
2
in solid state is
111
∘
.
Are the statements true or false?
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0%
True, True
0%
True, False
0%
False, True
0%
False, False
Explanation
In solid-state, the dihedral angle is smaller because of the presence of hydrogen bonding.
Hence, option (d) is the correct answer.
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