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NEET

Explore popular questions from Alcohols, Phenols and Ethers for NEET. This collection covers Alcohols, Phenols and Ethers previous year NEET questions hand picked by experienced teachers.

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Alcohols, Phenols and Ethers

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Q 1. The heating of phenyl methyl ether with HI produces

A

iodobenzene

phenol

C

benzene

D

ethyl chloride

Explanation

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Q 2. Which one is the most acidic compound?

A

B

D

Explanation


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Q 3. The reaction

can be classified as

A

dehydration reaction

B

Williamson alcohol synthesis reaction

Williamson ether synthesis reaction

D

alcohol formation reaction.

Explanation


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Q 4. Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

A

{tex} - \mathrm { COH } {/tex}

B

{tex}\mathrm{-CHCl_{2}}{/tex}

{tex} - \mathrm { CHO } {/tex}

D

{tex}\mathrm{-CH_{2}Cl}{/tex}

Explanation


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Q 5. Which of the following reaction(s) can be used for the preparation of alkyl halides?

A

(1) and (II) only

B

(IV) only

C

(III) and (IV) only

(I), (III) and (IV) only

Explanation


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Q 6. The reaction,is called

A

Etard reaction

B

Gattermann-Koch reaction

Williamson ether synthesis

D

Williamson continuous etherification process.

Explanation

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Q 7. Which of the following will not be soluble in sodium hydrogen carbonate?

A

{tex} 2,4,6 - {/tex} Trinitrophenol

B

Benzoic acid

o-Nitrophenol

D

Benzenesulphonic acid

Explanation


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Q 8. Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

B

C

{tex} \mathrm { CH } _ { 3 } - \mathrm { CH } _ { 2 } - \mathrm { CH } _ { 2 } - \mathrm { O } - \mathrm { CH } _ { 3 } {/tex}

D

Explanation


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Q 9. Number of isomeric alcohols of molecular formula {tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 14 } \mathrm { O } {/tex} which give positive iodoform test is

A

three

four

C

five

D

{tex} \mathrm { two } {/tex}

Explanation


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Q 10. In the following sequence of reactions

the end product {tex} ( C ) {/tex} is

A

acetone

B

methane

C

acetaldehyde

ethyl alcohol

Explanation

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Q 11. Which of the following compounds can be used as antifreeze in automobile radiators?

A

Methyl alcohol

Glycol

C

Nitrophenol

D

Ethyl alcohol

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Q 12. Given are cyclohexanol (I), acetic acid (II), {tex} 2,4,6 {/tex} -trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be

{tex} \mathrm { III } > \mathrm { II } > \mathrm { IV } > \mathrm { I } {/tex}

B

{tex} \mathrm { II } > \mathrm { III } > \mathrm { I } > \mathrm { IV } {/tex}

C

{tex} \mathrm { II } > \mathrm { III } > \mathrm { IV } > \mathrm { I } {/tex}

D

{tex} \mathrm { III } > \mathrm { IV } > \mathrm { II } > \mathrm { I } {/tex}

Explanation



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Q 13. When glycerol is treated with excess of HI, it produces
(a)2-iodopropane
(b)allyl iodidel
(c)propanel
(d)glycerol triiodide

2-iodopropane

B

allyl iodide

C

propene

D

glycerol triodide

Explanation



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Q 14. Following compounds are given

Which of the above compoound(s), on being warmed with iodine solution and NaOH, will give iodoform?

A

(i), (iii) and (iv)

B

Only (ii)

(i), (ii) and (iii)

D

(i) and (ii)

Explanation


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Q 15. Match the compounds given in List I with their characteristic reactions given in List II. Select the correct option.

The acidity order is

A

{tex} \mathrm { A } - ( \mathrm { ii } ) , \mathrm { B } - ( \mathrm { i } ) , \mathrm { C } - ( \mathrm { iv } ) , \mathrm { D } - ( \mathrm { iii } ) {/tex}

B

{tex} \mathrm { A } - ( \mathrm { iii } ) , \mathrm { B } - ( \mathrm { ii } ) , \mathrm { C } - ( \mathrm { i } ) , \mathrm { D } - ( \mathrm { iv } ) {/tex}

{tex} \mathrm { A } - ( \mathrm { ii } ) , \mathrm { B } - ( \mathrm { iii } ) , \mathrm { C } - ( \mathrm { i } ) , \mathrm { D } - ( \mathrm { iv } ) {/tex}

D

{tex} A - ( i v ) , B - ( i i ) , C - ( i i ) , D - ( i ) {/tex}

Explanation



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Q 16. Consider the following reaction
the product Z is

A

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } - \mathrm { O } - \mathrm { CH } _ { 2 } - \mathrm { CH } _ { 3 } {/tex}

B

{tex} \mathrm { CH } _ { 3 } - \mathrm { CH } _ { 2 } - \mathrm { O } - \mathrm { SO } _ { 3 } \mathrm { H } {/tex}

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } {/tex}

D

{tex} \mathrm { CH } _ { 2 } = \mathrm { CH } _ { 2 } {/tex}

Explanation


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Q 17. {tex} \mathrm { HOCH } _ { 2 } \cdot \mathrm { CH } _ { 2 } \mathrm { OH } {/tex} on heating with periodic acid gives

A

{tex}2 \mathrm { HCOOH } {/tex}

B

{tex} 2 _ { \mathrm { H } } ^ { \mathrm { H } } > \mathrm { C } = \mathrm { O } {/tex}

D

{tex}2 \mathrm { CO } _ { 2 } {/tex}

Explanation


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Q 18. In the reaction:

Which of the following compounds will be formed?

A

B

D

Explanation


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Q 19. The general molecular formula, which represents the homologous series of alkanols is

{tex} \mathrm { C } _ { n } \mathrm { H } _ { 2 n + 2 } \mathrm { O } {/tex}

B

{tex} \mathrm { C } _ { n } \mathrm { H } _ { 2 n } \mathrm { O } _ { 2 } {/tex}

C

{tex} \mathrm { C } _ { n } \mathrm { H } _ { 2 n } \mathrm { O } {/tex}

D

{tex} \mathrm { C } _ { n } \mathrm { H } _ { 2 n + 1 } \mathrm { O } {/tex}

Explanation


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Q 20. Ethylene oxide when treated with Grignard reagent yields

primary alcohol

B

secondary alcohol

C

tertiary alcohol

D

cyclopropyl alcohol.

Explanation