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

\(\xrightarrow[273-278 \mathrm{~K}]{\mathrm{NaNO}_2 / \mathrm{HCl}} x \xrightarrow{\mathrm{Cu}_2 \mathrm{Br}_2} Y \xrightarrow[\mathrm{H}_2 \mathrm{SO}_4]{\mathrm{HNO}_3} Z\)

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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?

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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 :

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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

\(\xrightarrow[273-278 \mathrm{~K}]{\mathrm{NaNO}_2 / \mathrm{HCl}} x \xrightarrow{\mathrm{Cu}_2 \mathrm{Br}_2} Y \xrightarrow[\mathrm{H}_2 \mathrm{SO}_4]{\mathrm{HNO}_3} Z\)

1

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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

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 :

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3

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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

\(\xrightarrow[273-278 \mathrm{~K}]{\mathrm{NaNO}_2 / \mathrm{HCl}} x \xrightarrow{\mathrm{Cu}_2 \mathrm{Br}_2} Y \xrightarrow[\mathrm{H}_2 \mathrm{SO}_4]{\mathrm{HNO}_3} Z\)

1

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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

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

\(\xrightarrow[273-278 \mathrm{~K}]{\mathrm{NaNO}_2 / \mathrm{HCl}} x \xrightarrow{\mathrm{Cu}_2 \mathrm{Br}_2} Y \xrightarrow[\mathrm{H}_2 \mathrm{SO}_4]{\mathrm{HNO}_3} Z\)

1

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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

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 :

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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