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Which of the following on addition of water in presence of acid gives a ketone
Options
(a) Propene
(b) Butene-2
(c) Propyne
(d) None of these
Correct Answer:
Propyne
Explanation:
Alkynes on hydration in presence of dilute H₂SO₄ and HgSO₄ as catalyst produces aldehydes and ketones. Water adds to form unstable enol intermediates which undergo rearrangment to form aldehyde or ketones. Acetylene on hydration gives aldehydes while all other alkynes produce ketones,
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Topics: Aldehydes Ketones and Carboxylic Acid
(89)
Subject: Chemistry
(2512)
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