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NCERT Class XI Chemistry Hydrocarbons Solutions

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Question : 20
Total: 25
How would you convert the following compounds into benzene?
(i) Ethyne
(ii) Ethene
(iii) Hexane
Solution:  
(i)
HC≡CH
Ethyne
red‌hot‌iron‌tube
→
873K

(ii)
CH2=CH2
Ethene
Br2
→
CCl4
CH2
|
Br
−
CH2
|
Br
alc.KOH
→
Δ
 CH2=CHBr
NaH2∕liquid‌N‌H3,196K
→
 HC≡CH
red‌hot‌iron‌tube,873K
→

(iii)
C6H14
Hexane
Cr2O3∕V2O5∕Mo2O3
→
773K,10−20‌atm
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