Hydrocarbons Question 276

Question: Acid catalyzed hydration of alkenes except ethane leads to the formation of

Options:

A) mixture of secondary and tertiary alcohols

B) mixture of primary and secondary alcohols

C) secondary or tertiary alcohol

D) primary alcohol

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $ CH_3-CH=CH_2+H_2O\xrightarrow{H_2SO_4}\underset{2{}^\circ alcohol}{\mathop{CH_3-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}}}-CH_3}} $

$ CH_3-\overset{CH_3}{\mathop{\overset{|}{\mathop{C}}}}=CH_2+H_2O\xrightarrow{H_2SO_4}\underset{3{}^\circ alcohol}{\mathop{CH_3-\underset{OH}{\overset{CH_3}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}}}}-CH_3}} $ Addition follows Markovnikov’s rule.