Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
A
B
C
D
Explanation
2
MCQ (Single Correct Answer)
AIPMT 2012 Mains
Consider the following reaction
The product A is
A
C6H5CHO
B
C6H5OH
C
C6H5COCH3
D
C6H5Cl
Explanation
It is Rosenmund’s reaction.
3
MCQ (Single Correct Answer)
AIPMT 2012 Mains
Consider the reaction :
RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2
What sort of reaction is it?
A
Electrophilic addition-elimination reaction
B
Free radical addition-elimination reaction
C
Electrophilic substitution-elimination reaction
D
Nucleophilic addition-elimination reaction
Explanation
RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2
Such reactions take place in slightly acidic
medium and involve nucleophilic addition of the
ammonia derivative.
4
MCQ (Single Correct Answer)
AIPMT 2012 Prelims
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is
A
B > A > D > C
B
B > D > C > A
C
A > B > C > D
D
A > C > B > D
Explanation
As –I effect increases, COOH group
becomes more electron deficient and tendency to
loose H+
ions increases i.e., acid strength increases.
As +I effect increases, acid strength decreases.
Thus, correct order of acid strength is
Questions Asked from Aldehydes, Ketones and Carboxylic Acids
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