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Question

A gaseous hydrocarbon (12 ml) is exploded with an excess of oxygen. On cooling, the contraction in volume is 48 ml and there is further contraction of 48 ml in volume when passed through CO2. The molecular formula of hydrocarbon is:

A
C3H6
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B
C3H8
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C
C4H10
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D
C4H8
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Solution

The correct option is D C4H8
Volume of hydrocarbon =12 mL
on passing through line water, contraction in volume =48 mL
n=12, nx=48x=4812=4
Number of carbon in given hydrocarbon =4
Only alkenes react with line water,
Molecular formula CnH2n=C4H8

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