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Ten millilitre of a gaseous hydrocarbon ...

Ten millilitre of a gaseous hydrocarbon was burnt completely in 80 ml of `O_2` at STP. The volume of the remaining gas is 70 ml. The volume became 50 ml, on treatment with `NaOH`. The formula of the hydrocarbon is:

A

`C_(3)H_(6)`

B

`C_(2)H_(4)`

C

`CH_(4)`

D

`C_(6)H_(6)`

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The correct Answer is:
B
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