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Q.

A gasesous alkane requires five times its volume of oxygen under the same conditions for complete combustion. The molecular formula of the alkane is

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a

C2H6

b

C3H8

c

CH4

d

C4H10

answer is C.

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Detailed Solution

General equation of combustion: 

CnH2n+(3n+12)O2→nCO2+(n+1)H2O

3n+12=5 n=3

General formula of alkanes:

 CnH2n+2 for n=3: C3H8

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