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JEE CHEMISTRY MCQ: ALDEHYDES & KETONES & CARBOXYLIC ACIDS
1
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Analyzing
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Assertion: Fehling’s solution can be used to distinguish benzaldehyde from
acetaldehyde.
Reason: The bond of group in benzaldehyde is stronger than bond
of group in acetaldehyde.
acetaldehyde.
Reason: The bond of group in benzaldehyde is stronger than bond
of group in acetaldehyde.
View answer and explanation
Correct option: A
Both A and R are correct and R is correct explanation of A
The correct answer is A because Fehling's solution can distinguish benzaldehyde from acetaldehyde, and the C-H bond in benzaldehyde's CHO group is indeed stronger than in acetaldehyde's.
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By passing water gas through an electric discharge at low pressure, we get:
Addition of alcohols to aldehydes and ketones takes place in presence of dry gas because it
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increases the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as Which one of the following reactions is a condensation reaction? Carboxylic acids dimerise due to The number of aldehyde isomers for will be
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increases the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as Which one of the following reactions is a condensation reaction? Carboxylic acids dimerise due to The number of aldehyde isomers for will be