Alcohols Phenols And Ethers Question 249
Question: When glycerol is heated with $ KHSO_4 $ it gives
[CPMT 1974, 85; MP PMT 1988, 90, 91, 92, 94; MP PET 1988, 92]
Options:
A) $ CH_2=CH-CH_3 $
B) $ CH_2=CH-CH_2OH $
C) $ CH_2=CH-CHO $
D) $ CH_2=C=CH_2 $
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Answer:
Correct Answer: C
Solution:
$ \underset{Glycerol}{\mathop{\underset{\underset{OH}{\mathop{H-\underset{|}{\mathop{C}}-H}}}{\overset{H-\overset{H}{\mathop{\overset{|}{\mathop{C}}}}-OH}{\mathop{HO-\underset{|}{\overset{|}{\mathop{C}}}-H}}}}}\xrightarrow{KHSO_4}\underset{Unstable}{\mathop{\overset{\overset{H-\overset{\overset{H}{\mathop{|}}}{\mathop{C}}}{\mathop{||}}}{\mathop{\underset{\underset{\underset{OH}{\mathop{\underset{|}{\mathop{C}}-H}}}{\mathop{||}}}{\mathop{C}}}}}}\xrightarrow{{}} $
$ \overset{\overset{H-\overset{\overset{H}{\mathop{|}}}{\mathop{C}}}{\mathop{||}}}{\mathop{\underset{\underset{\underset{\underset{O}{\mathop{||}}}{\mathop{C}}-H}{\mathop{||}}}{\mathop{C-H}}}} $ or $ \underset{Acrolein}{\mathop{\underset{\underset{CHO}{\mathop{|}}}{\overset{\overset{CH_2}{\mathop{||}}}{\mathop{CH}}}}} $
BETA
