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Byju's Answer
Standard XII
Chemistry
Properties and Uses of Calcium Oxide
On strong hea...
Question
On strong heating of
C
a
O
and
C
.The product formed is/are:
A
C
a
and
C
O
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B
C
a
C
2
and
C
O
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C
C
a
(
O
H
)
2
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D
C
a
C
2
and
C
O
2
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Solution
The correct option is
A
C
a
C
2
and
C
O
Option
(
B
)
is correct.
On strong heating of
C
a
O
and
C
, calcium carbide and carbonmonoxide is formed.
C
a
O
+
C
→
C
a
C
2
+
C
O
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0
Similar questions
Q.
Calcium carbide is made in an electric-furnace by the reaction given below:
C
a
O
+
3
C
⟶
C
a
C
2
+
C
O
The crude product is usually
85
%
C
a
C
2
and
15
%
unreacted
C
a
O
.
How much
C
a
C
2
would this crude product contain?
[Given atomic mass of
C
a
=
40
amu,
C
=
12
amu,
O
=
16
amu]
Q.
How much heat will be required to make
2
k
g
of calcium carbide
(
C
a
C
2
)
according to the following reaction?
C
a
O
(
s
)
+
3
C
(
s
)
→
C
a
C
2
+
C
O
(
g
)
The heats of formation of
C
a
O
(
s
)
,
C
a
C
2
(
s
)
and
C
O
(
g
)
are
−
151.6
,
−
14.2
,
−
26.4
k
c
a
l
respectively.
Q.
What is the amount of heat to be supplied to prepare
128
g
of
C
a
C
2
by using
C
a
C
O
3
and followed by reaction with carbon. Reactions are:
C
a
C
O
3
(
s
)
→
C
a
O
(
s
)
+
C
O
2
(
g
)
;
△
H
o
=
42
.8
kcal
C
a
O
(
s
)
+
3
C
(
s
)
→
C
a
C
2
(
s
)
+
C
O
(
g
)
;
△
H
o
=
111
kcal
Q.
Calcium carbide is made in an electric furnace by the reaction:
C
a
O
+
3
C
⟶
C
a
C
2
+
C
O
The crude product is usually
85
%
C
a
C
2
and
15
%
unreacted
C
a
O
.
(a)The amount of
C
a
O
with which we should start to produce
450
kg of crude product is
x
kg.
(b) Amount of
C
a
C
2
which this crude product will contain is
y
kg.
The value of
x
+
y
in a nearest integer is :
Q.
Calcium carbide is made in an electric-furnace by the following reaction :
C
a
O
+
3
C
⟶
C
a
C
O
2
+
C
O
The crude product is usually
85
%
C
a
C
2
and
15
%
unreacted
C
a
O
. How much
C
a
O
should we start with to produce
450
kg of crude product?
(Given that molecular weight of
C
a
=
40
,
C
=
12
,
O
=
16
g/mol)
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