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Standard XII

Chemistry

Other Synthesis Methods

Which of the ...

Question

Which of the following compounds reacts with $N a N O_{2}$ and $H C l a t 0 - 4^{o} C$ to give alcohol/ phenol ?

C_{6} H_{5} N H_{2}

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C_{2} H_{5} N H_{2}

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C H_{3} N H C H_{3}

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C_{6} H_{5} N H C H_{3}

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Solution

The correct option is B $C_{2} H_{5} N H_{2}$
Aliphatic primary amines react with $N a N O_{2} a n d H C l$ to yield alcohols.
$C_{2} H_{5} N H_{2} + H N O_{2} (N a N O_{2} + H C l) \to C_{2} H_{5} O H + N_{2} + H_{2} O$

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Similar questions

Q. Which of the following reacts with

N a N O_{2} + H C l

to give phenol

Q. Arrange the following in the increasing order of their

p K_{b}

values.

C_{6} H_{5} N H_{2}, C_{2} H_{5} N H_{2}, C_{6} H_{5} N H C H_{3}

Q. Point out the correct decreasing order of

p K_{b}

values of following amines:

C_{2} H_{5} N H_{2}

C_{6} H_{5} N H C H_{3},

(C_{2} H_{5})_{2} N H

and

C_{6} H_{5} N H_{2}

Q. Which of the following reacts with

N a N O_{2} + H C l

followed by warming with water to give phenol?

Arrange the following:

(i) In the decreasing order of the $p K_{b}$ values
$C_{2} H_{5} N H_{2}, C_{6} H_{5} N H C H_{3}, (C_{2} H_{5})_{2} N H$ and $C_{6} H_{5} N H_{2}$

(ii) In increasing order of basic strength:
$C_{6} H_{5} N H_{2}, C_{6} H_{5} N (C H_{3})_{2}, (C_{6} H_{5})_{2} N H a n d C H_{3} N H_{2}$

(iii) In increasing order of basic strength:
(a) Aniline, p-nitroaniline and p-toluidine
(b) $C_{6} H_{5} N H_{2}, C_{6} H_{5} N H C H_{3}, C_{6} H_{5} C H_{2} N H_{2}$

(iv) In decreasing order of basic strength in gas phase :

$C_{2} H_{5} N H_{2}, (C_{2} H_{5})_{2} N H, (C_{2} H_{5})_{3} N a n d N H_{3}$

(v) In increasing order of boiling point:

$C_{2} H_{5} O H, (C H_{3})_{2} N H, C_{2} H_{5} N H_{2} .$

(vi) In increasing order of solubility in water :

$C_{6} H_{5} N H_{2}, (C_{2} H_{5})_{2} N H, C_{2} H_{5} N H_{2} .$

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Which of the following compounds reacts with NaNO2 and HClat0−4oC to give alcohol/ phenol ?

The correct option is B C2H5NH2Aliphatic primary amines react with NaNO2andHCl to yield alcohols. C2H5NH2+HNO2(NaNO2+HCl)→C2H5OH+N2+H2O

Which of the following compounds reacts with $N a N O_{2}$ and $H C l a t 0 - 4^{o} C$ to give alcohol/ phenol ?

The correct option is B $C_{2} H_{5} N H_{2}$
Aliphatic primary amines react with $N a N O_{2} a n d H C l$ to yield alcohols.
$C_{2} H_{5} N H_{2} + H N O_{2} (N a N O_{2} + H C l) \to C_{2} H_{5} O H + N_{2} + H_{2} O$