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Q.

For the dissociation of ${PCl}_{5}$ into ${PCl}_{3}$ and ${Cl}_{2}$ in gaseous phase reaction, if d is the observed vapour density and D the theoretical vapour density with $' α'$ as degree of dissociation variation of D/d with $' α'$ is given by?

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a

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b

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c

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d

None of these

answer is A.

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Detailed Solution

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${PCl}_{5} (g) ⇌ {PCl}_{3} (g) + {Cl}_{2} (g)$
For n=2
$α = \frac{D - d}{(2 - 1) \cdot d} \Rightarrow α = \frac{D - d}{d} = \frac{D}{d} - 1 α = (1) \frac{D}{d} - 1 y = mx + c$

If $(\frac{D}{d}) \overset{}{\to}$ at x-axis and $(α) \overset{}{\to}$ at y-axis then it is a straight line positive slope and negative intercept.

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For the dissociation of PCl5 into PCl3 and Cl2 in gaseous phase reaction, if d is the observed vapour density and D the theoretical vapour density with 'α' as degree of dissociation variation of D/d with 'α' is given by?