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WBJEE 2022 Physics and Chemistry Paper
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© examsnet.com
Question : 67
Total: 80
C
6
H
6
(
liq
)
+
15
2
O
2
(
g
)
→
6
C
O
2
(
g
)
+
3
H
2
O
(liq)
Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of 39 gram of liquid benzene?
11.2
litre
22.4
litre
84 litre
168 litre
Validate
Solution:
Hint
:
n
C
6
H
6
=
39
78
=
1
2
mole
From Balanced equation,
n
C
r
H
G
=
2
15
n
O
2
1
2
=
2
15
×
x
L
22.4
L
∴
x
=
84
L
© examsnet.com
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