Question

Which one of the following compounds is most acidic ?

A. Alcohol, Phenol and Ether mcq option image
B. Alcohol, Phenol and Ether mcq option image
C. Alcohol, Phenol and Ether mcq option image  
D. Alcohol, Phenol and Ether mcq option image
Answer :   Alcohol, Phenol and Ether mcq option image
Solution :
Phenols are much more acidic than alcohols, due to the stabilisation of phenoxide ion by resonance
Alcohol, Phenol and Ether mcq solution image
Phenoxide ion is stabilised due to following resonating structures :
Alcohol, Phenol and Ether mcq solution image

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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