278806 The major product $Z$ obtained in the following reaction scheme is

$\underset{273-278\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}x\stackrel{{\mathrm{Cu}}_2{\mathrm{Br}}_2}{\to }Y\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{HNO}}_3}{\to }}Z$

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278768 The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

1

2

3

4

278778 A primary aliphatic amine on reaction with nitrous acid in cold $(273\mathrm{K})$ and there after raising temperature of reaction mixture to room temperature ( $298\mathrm{K})$, gives

278806 The major product $Z$ obtained in the following reaction scheme is

$\underset{273-278\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}x\stackrel{{\mathrm{Cu}}_2{\mathrm{Br}}_2}{\to }Y\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{HNO}}_3}{\to }}Z$

1

2

3

4

278768 The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

1

2

3

4

278770 An organic compound ' $A$ ' on reaction with NH3 followed by heating gives compound $B$. which on further strong heating gives compound $\mathrm{C}\left({\mathrm{C}}_8{\mathrm{H}}_5{\mathrm{NH}}_2\right)$. Compound $\mathrm{C}$ on sequential reaction with ethanolic $\mathrm{KOH}$, alkyl chloride and hydrosis with alkali gives a primary amine. The compound $A$ is :

1

2

3

4

278778 A primary aliphatic amine on reaction with nitrous acid in cold $(273\mathrm{K})$ and there after raising temperature of reaction mixture to room temperature ( $298\mathrm{K})$, gives

278806 The major product $Z$ obtained in the following reaction scheme is

$\underset{273-278\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}x\stackrel{{\mathrm{Cu}}_2{\mathrm{Br}}_2}{\to }Y\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{HNO}}_3}{\to }}Z$

1

2

3

4

278768 The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

1

2

3

4

278770 An organic compound ' $A$ ' on reaction with NH3 followed by heating gives compound $B$. which on further strong heating gives compound $\mathrm{C}\left({\mathrm{C}}_8{\mathrm{H}}_5{\mathrm{NH}}_2\right)$. Compound $\mathrm{C}$ on sequential reaction with ethanolic $\mathrm{KOH}$, alkyl chloride and hydrosis with alkali gives a primary amine. The compound $A$ is :

1

2

3

4

278778 A primary aliphatic amine on reaction with nitrous acid in cold $(273\mathrm{K})$ and there after raising temperature of reaction mixture to room temperature ( $298\mathrm{K})$, gives

278806 The major product $Z$ obtained in the following reaction scheme is

$\underset{273-278\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}x\stackrel{{\mathrm{Cu}}_2{\mathrm{Br}}_2}{\to }Y\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{HNO}}_3}{\to }}Z$

1

2

3

4

278768 The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

1

2

3

4

278770 An organic compound ' $A$ ' on reaction with NH3 followed by heating gives compound $B$. which on further strong heating gives compound $\mathrm{C}\left({\mathrm{C}}_8{\mathrm{H}}_5{\mathrm{NH}}_2\right)$. Compound $\mathrm{C}$ on sequential reaction with ethanolic $\mathrm{KOH}$, alkyl chloride and hydrosis with alkali gives a primary amine. The compound $A$ is :

1

2

3

4

278778 A primary aliphatic amine on reaction with nitrous acid in cold $(273\mathrm{K})$ and there after raising temperature of reaction mixture to room temperature ( $298\mathrm{K})$, gives