Nmdcat Practice Paper from PMDC Syllabus | mosaicbro.com

Nmdcat Practice Paper from PMDC Syllabus

7 of 197 questions (Page 20 of 29)

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134 What is the product when an aldehyde is reduced with LiAlH₄?
Correct Answer: B
Explanation: LiAlH₄ reduces aldehydes to primary alcohols.
135 In the reaction of a ketone with hydrazine (NH₂NH₂) under basic conditions, the major product is:
Correct Answer: D
Explanation: Ketones react with hydrazine to form hydrazones.
136 Carboxylic acids react with alcohols in the presence of concentrated sulfuric acid to form:
Correct Answer: C
Explanation: Carboxylic acids and alcohols undergo esterification to form esters.
137 Which of the following acids is the strongest?
Correct Answer: A
Explanation: Formic acid (HCOOH) is the strongest due to its lack of electron-donating alkyl groups.
138 Which of the following will react with sodium carbonate to produce carbon dioxide gas?
Correct Answer: C
Explanation: Carboxylic acids react with sodium carbonate to release CO₂.
139 Which of the following has the highest boiling point?
Correct Answer: C
Explanation: Carboxylic acids have the highest boiling points due to hydrogen bonding.
140 Which reagent can be used to convert a primary alcohol into a carboxylic acid?
Correct Answer: C
Explanation: Potassium permanganate (KMnO₄) oxidizes primary alcohols to carboxylic acids.
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