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1

AIPMT 2015

MCQ (Single Correct Answer)
The number of structural isomers possible from the molecular formula C3H9N is
A
5
B
2
C
3
D
4

Explanation



Total 4 structural isomers are possible.
2

AIPMT 2015

MCQ (Single Correct Answer)
Method by which aniline cannot be prepared is
A
degradation of benzamide with bromine in alkaline solution
B
reduction of nitrobenzene with H2/Pd in ethanol
C
potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution
D
hydrolysis of phenylisocyanide with acidic solution.

Explanation

Because arylhalides do not undergo nucleophilic substitution reaction with potassium phthalimide easily.
3

AIPMT 2015

MCQ (Single Correct Answer)
The following reaction

is known by the name
A
Perkin's reaction
B
Acetylation reaction
C
Schotten-Baumann reaction
D
Friedel-Craft's reaction

Explanation

Schotten-Bauman reaction is a method to synthesize amides from amines and acid chlorides.
4

AIPMT 2014

MCQ (Single Correct Answer)
Which of the following will be most stable diazonium salt RN2+X$$-$$?
A
CH3N2+X$$-$$
B
C6H5N2+X$$-$$
C
CH3CH2N2+X$$-$$
D
C6H5CH2N2+X$$-$$

Explanation

Diazonium salt containing aryl group directly linked to the nitrogen atom is most stable due to resonance stabilization.

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