Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
A
B
C
D
Explanation
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
Consider the following reaction
The product A is
A
C6H5CHO
B
C6H5OH
C
C6H5COCH3
D
C6H5Cl
Explanation
It is Rosenmund’s reaction.
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
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
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
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
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
