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Byju's Answer
Standard X
Chemistry
Volume of Gases and Number of Moles
Volume of C...
Question
Volume of
C
O
2
obtained at STP by the complete decomposition of 9.85 gm
B
a
C
O
3
is:
[Molecular weight of
B
a
C
O
3
=
197
]
A
2.24 litre
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B
1.12 litre
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C
0.85 litre
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D
0.56 litre
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Solution
The correct option is
B
1.12 litre
Volume of 1 mole of
C
O
2
at STP = 22.4 litre
Volume of
C
O
2
obtained after complete decomposition of 9.85gm of
B
a
C
O
3
is:
B
a
C
O
3
→
B
a
O
+
C
O
2
No of moles of
B
a
C
O
3
obtained =
9.85
197
= 0.05 mole
As 1 mole of
B
a
C
O
3
gives 1 mole of
C
O
2
,
Therefore, number of moles of
C
O
2
obtained = 0.05 mole
∴
Volume of
C
O
2
obtained at STP
=
22.4
×
0.05
=
1.12
litre
Hence, option
B
is correct.
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Similar questions
Q.
The volume of
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O
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