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CBSE Class 12 Chemistry 2016 Outside Delhi Set 1 Solved Paper

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Question : 19 of 26
Marks: +1, -0
How do you convert:
(i) Chlorobenzene to biphenyl,
(ii) Propene to 1-iodopropane,
(iii) 2-bromobutane to but-2-ene.
OR
Write the major product (s) in the following:
(i)
(ii) 2CH3−CH∣Cl−CH3→   dry ether   Na2 \mathrm{CH}_3-\underset{\mathrm{Cl}}{\underset{\vert}{\mathrm{CH}}}-\mathrm{CH}_3 \xrightarrow[\;\text{ dry ether }\;]{\mathrm{Na}} ?
(iii) CH3−CH2−Br→AgCN\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Br} \xrightarrow[]{\mathrm{AgCN}} ?
Solution:  
(i)
(ii) CH3CH=CH2→HBr/   peroxide   \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow[]{\mathrm{HBr} / \;\text{ peroxide }\;} CH3CH2CH2Br→  Nal / acetone  \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br} \xrightarrow[]{\;\text{Nal / acetone}\;} CH3CH2CH2I\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{I}
(iii) CH3CH2CH∣BrCH3→  Alc.KOH  \mathrm{CH}_3 \mathrm{CH}_2 \underset{\mathrm{Br}}{\underset{\vert}{\mathrm{CH}}}\mathrm{CH}_3 \xrightarrow[]{\;\text{Alc.KOH}\;} CH3CH=CHCH3\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3
OR(i)
(ii) CH3−CH∣CH3−CH∣CH3−CH3\mathrm{CH}_3-\overset{\mathrm{CH}_3}{\overset{\vert}{\mathrm{CH}}}-\overset{\mathrm{CH}_3}{\overset{\vert}{\mathrm{CH}}}-\mathrm{CH}_3
(iii) CH3CH2NC\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{NC}
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