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Two organic compounds X and Y on analysi...

Two organic compounds X and Y on analysis gave the same percentage composition namely, `C = (12//13) xx 100% and H = (1//13) xx 100%`. However, compound X decolourises bromine water while compound Y does not. The two compounds X and Y may be respectively.

A

acetylene and ethylene

B

acetylene and benzene

C

ethylene and benzene

D

toluene and benzene

Text Solution

Verified by Experts

The correct Answer is:
B
The percentage composition of compounds X and Y
`{:(C,:,H),((12)/(13) xx 100%,:,(1)/(13) xx 100%):}`
i.e., the ratio of masses of C and H in the organic compounds
`{:(C,:,H),((12)/(13),:,(1)/(13)):}`
or 12 : 1
Thus, the empirical formula of the compounds X and Y is CH and X decolourise bromine water while Y does not. Thus, X and Y must be acetylene (CH = CH) and benzene `(C_(6)H_(6))` respectively.
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