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Standard IX

Biology

Monosaccharides

A compound ...

Question

A compound $X$ does not give $N_{2}$ on heating. Its aqueous solution when heated with caustic soda liberate a gas $Y$ which turns red litmus blue. Heating of alkaline solution of $X$ is continued to expell the gas $Y$ completely. However residual solution again liberates the gas $Y$ when heated with zinc powder. If $X = N H_{x} N O_{y}$ and $Y = N H_{z}$ . Determine the value of x ,y and z.

x = 4, y = 3, z = 3

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x = 3, y = 4, z = 3

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x = 3, y = 3, z = 4

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None of these

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Solution

The correct option is A $x = 4, y = 3, z = 3$
Ammonium nitrate decomposes on heating to give N2O gas(but nitrogen gas is not liberated)
Aqueous solution of Ammonium nitrate when heated with caustic soda( common name for sodium hydroxide ) liberates ammonia gas( basic in nature and hence turns red litmus to blue)
Hence x=4 , y=3 ,z=3

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