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Arrhenius Acid

Ammonium carb...

Question

Ammonium carbamate when heated to $200^{0} C$ gives a mixture of ${N H}_{3}$ and ${C O}_{2}$ with a vapour density of 13. What is the degree of dissociation of ammonium carbamate?

A

\frac{3}{2}

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B

\frac{1}{2}

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C

2

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D

1

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Solution

The correct option is D $1$
$N H_{2} C O O N H_{4} \Leftrightarrow 2 N H_{3} + C O_{2}$

$α = \frac{D - d}{(n - 1) d}$ where D is the density (initial)

$D = \frac{m o l . w t}{2} = \frac{78}{2} = 39$

$n =$ no. of product $= 3, d =$ final density

$α = \frac{39 - 13}{(3 - 1) 13} = 1,$ so $α = 1$

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