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Alcohol, phenol & ether MCQs for NEET — Chemistry Questions with Answers

Practice free Alcohol, phenol & ether (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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Diacetone alcohol is obtained by the reaction of:

acetone and ethanol

acetone and conc. H₂SO₄

acetone and Ba(OH)₂

acetone and Al(OH)₃

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Ethers are very good solvent for which type of compounds?

Lewis base

Acids

Lewis acids

None of these

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Explanation

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Intermolecular dehydration of alcohols gives:

alkenes

ketones

alkynes

ethers

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Explanation

(d) ROH + HOR $\underset{- H_{2} O}{\to}$ ROR

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The product C in the following sequence of reaction,

$C_{2} H_{5} Br \overset{NaOH (aq)}{\to} A \overset{Na}{\to} B \overset{{CH}_{3} I}{\to} C$ is :

butane

ethane

methyl ethyl ether

propane

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Explanation

(c) $C_{2} H_{5} Br \overset{NaOH (aq)}{\to} C_{2} H_{5} OH \overset{Na}{\to} C_{2} H_{5} ONa \overset{{CH}_{3} I}{\to} C_{2} H_{5} {OCH}_{3}$

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Diethyl ether may be regarded as anhydride of:-

C₂H₅COOH

C₂H₅OH

C₂H₅CHO

C₂H₅COOC₂H5

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Explanation

(b) C₂H₅OH+HOC₂H₅ →C₂H₅OC₂H₅
-H2O

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The reaction of CH₃OC₂H₅ with HI give:-

CH₃I only

C₂H₅OH only

CH₃I+C₂H₅OH

C₂H₅I+CH₃OH

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Explanation

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Lubricant used in watch is:

coconut oil

pine oil

animal oil

glycerol

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Explanation

(d) Glycerol is used as lubricant in watches.

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The value of C-O-C angle in ether molecule is:-

180°

150°

90°

110°

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Explanation

(d) Bond angle is 110° due to steric hindrance of bulky alkyl gps.

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An aldehyde on treatment with Zn/HCl yields:

1 $°$ alcohol

2 $°$ alcohol

3 $°$ alcohol

none of these

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Explanation

(a) CH₃CHO $\overset{Reduction}{\to}$ CH₃CH₂OH

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Under drastic conditions all the alcohols can be oxidized to carboxylic acids but the following alcohols give carboxylic acids having same number of carbon atoms:

primary

secondary

tertiary

none of these

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Explanation

(a) CH₃.CH₂OH $\to$ CH₃COOH; secondary and tertiary alcohols give acids of less carbon atoms.

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