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Chemistry MCQs for NEET — Practice Questions with Answers

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Methanol and ethanol can be distinguished by the following:

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Explanation

(c) C2H5OH gives iodoform test.

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Which of the following methods cannot be used for the preparation of an ester?

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Explanation

(a) RCOOH+HOR'→RCOOR'
                         H+           Ester

RCOCl+HOR'→RCOOR'+HCl
                Pyridine
(RCO)2O+2HOR'→RCOOR'+H2O
               Pyridine
The esterification by RCOOH and R'OH does not take place in alkaline medium.

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Methylated spirit is:

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Explanation

(b) Ethyl alcohol is mixed with methyl alcohol to denaturate it in order to prevent its use for drinking purposes.

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Absolute alcohol is prepared from rectified spirit by:

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Explanation

(c) Alcohol forms a azeotropic mixture with water and absolute alcohol is obtained by this mixture (rectified spirit) by adding benzene and then carrying out fractional distillation.

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Widespread deaths due to liquor poisoning occurs due to presence of:

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Explanation

(b) CH3OH is toxic and injurious to health and therefore also used for denaturation of alcohol.

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Which of the following reagents can convert acetic acid into ethanol?

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Explanation

(c) -COOH→LiAIH4-CH2OH

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There are four alcohols P, Q, R and S which have 3, 2, 1 and zero alpha hydrogen atom(s). Which one of the following
will not respond to Victor Meyer’s test?

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Explanation

(d) Tertiary alcohols do not give Viktor Meyer's test.

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Diacetone alcohol is obtained by the reaction of:

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Ethers are very good solvent for which type of compounds?

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Explanation

(c) Ethers are Lewis base and forms complex compounds with Lewis acids.

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Intermolecular dehydration of alcohols gives:

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Explanation

(d) ROH + HOR →-H2OROR

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