Hydrocarbons - Result Question 2

####2. Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is

[2018]

(a) $CH \equiv CH$

(b) $CH_2=CH_2$

(c) $CH_4$

(d) $CH_3-CH_3$

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Solution:

(c)

$ CH_4 \xrightarrow[h \nu]{Br_2} CH_3-Br \xrightarrow[\text{ ether }]{Na} $

$ CH_3-CH_3 $ (less than four ‘C’)



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