Question

Which of the following reactions will not result in the formation of anisole ?

A. Phenol + dimethyl sulphate in presence of a base
B. Sodium phenoxide is treated with methyl iodide
C. Reaction of diazomethane with phenol
D. Reaction of methylmagnesium iodide with phenol  
Answer :   Reaction of methylmagnesium iodide with phenol
Solution :
Phenol has active (acidic) hydrogen so it reacts with $$C{H_3}MgI$$   to give $$C{H_4},$$  and not anisole $${C_6}{H_5}OH + C{H_3}MgI \to $$      $$C{H_4} + {C_6}{H_5}OMgI$$

Releted MCQ Question on
Organic Chemistry >> Alcohol, Phenol and Ether

Releted Question 1

Ethyl alcohol is heated with conc $${H_2}S{O_4}$$  the product formed is

A. \[{{H}_{3}}C\underset{\begin{smallmatrix} \parallel \\ O \end{smallmatrix}}{\mathop{-C-}}\,O{{C}_{2}}{{H}_{5}}\]
B. $${C_2}{H_6}$$
C. $${C_2}{H_4}$$
D. $${C_2}{H_2}$$
Releted Question 2

The compound which reacts fastest with Lucas reagent at room temperature is

A. $${\text{butan - 1 - ol}}$$
B. $${\text{butan - 2 - ol}}$$
C. $${\text{2 - methylpropan - 1 - ol}}$$
D. $${\text{2 - methylpropan - 2 - ol}}$$
Releted Question 3

A compound that gives a positive iodoform test is

A. 1 - pentanol
B. 2 - pentanone
C. 3 - pentanone
D. pentanal
Releted Question 4

Diethyl ether on heating with conc. $$HI$$  gives two moles of $$H$$

A. ethanol
B. iodoform
C. ethyl iodide
D. methyl iodide

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Alcohol, Phenol and Ether


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