Nmdcat Practice Paper from PMDC Syllabus | mosaicbro.com

Nmdcat Practice Paper from PMDC Syllabus

7 of 197 questions (Page 19 of 29)

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127 Silver mirror test is given by:
Correct Answer: D
Explanation: Aldehydes reduce Tollen's reagent to form a silver mirror.
128 Low reactivities of ketones with respect to aldehydes is due to:
Correct Answer: D
Explanation: Ketones are less reactive due to steric hindrance and the electron-donating (+I) effect of alkyl groups.
129 Aldehydes on oxidation give acids of:
Correct Answer: A
Explanation: Aldehydes oxidize to carboxylic acids with the same number of carbon atoms.
130 Which statement is false regarding acetaldehyde and acetone:
Correct Answer: D
Explanation: Acetone does not reduce ammoniacal silver nitrate (Tollen's reagent).
131 Ethyl butyrate has a flavour of
Correct Answer: C
Explanation: Ethyl butyrate has a pineapple-like flavor.
132 According to I.U.P.A.C system aldehydes are:
Correct Answer: B
Explanation: Aldehydes are named as alkanals in the IUPAC system.
133 Which of the following reagents will react with both aldehyde and ketones?
Correct Answer: A
Explanation: Grignard's reagent reacts with both aldehydes and ketones to form alcohols.
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