1
MCQ (Single Correct Answer)

AIPMT 2014

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.
2
MCQ (Single Correct Answer)

AIPMT 2014

In the following reaction, the product (A) is
A
B
C
D

Explanation

3
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

Some reactions of amines are given. Which one is not correct?
A
B
CH3CH2NH2 + HNO2 $$ \to $$ CH3CH2OH + N2
C
CH3NH2 + C6H5SO2Cl $$ \to $$ CH3NHSO2C6H5
D
(CH3)2NH + NaNO2 + HCl  $$ \to $$ (CH3)2N $$-$$ N $$=$$ O

Explanation

Secondary amine react with nitrous acid to give N-Nitrosoamines.
4
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

On hydrolysis of a ''compound'', two compounds are obtained. One of which one treatment with sodium nitrite and hydrochloric acid gives a product which does not respond to iodoform test. The second one reduces Tollens reagent and Fehling's solution. The ''compound'' is
A
CH3CH2CH2NC
B
CH3CH2CH2CN
C
CH3CH2CH2ON $$=$$ O
D
CH3CH2CH2CON(CH3)2

Explanation

Hydrolysis of propyl isocyanide (CH3CH2CH2NC) gives CH3CH2CH2NH2 + HCOOH.

On treatment with NaNO2 and HCl I(CH3CH2CH2NH2) gives CH3CH2CH2OH which does not give iodoform test. II (HCOOH) reduces Tollen’s reagent and Fehling’s solution.

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