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Chemistry Question on Alcohols, Phenols and Ethers

C−OC-O bond in ether can be broken by:

A

HI

B

HCl

C

HBr

D

HF

Answer

HI

Explanation

Solution

In the reaction, ROR′+HX⟶ROH+R′XR O R'+ HX \longrightarrow R O H+R^{\prime} X the correct order of reactivity of halogen acids is : HI>HBr>HClHI > HBr > HCl The smaller alkyl group always forms alkyl halide while bigger alkyl group (or aryl group) forms alcohol (or phenol). CH3OCH(CH3)2+HI⟶CH3I+(CH3)2CHOHCH _{3} OCH \left( CH _{3}\right)_{2}+ HI \longrightarrow CH _{3} I +\left( CH _{3}\right)_{2} CHOH CH3OC6H5+HI⟶CH3I+C6H5OH Phenol CH _{3} OC _{6} H _{5}+ HI \longrightarrow CH _{3} I +\underset{\text { Phenol }}{ C _{6} H _{5} OH }