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Before equilibrium is set-up the chemical reaction `N_(2)O_(4)(g) hArr 2NO_(2)(g)`, vapour density d of the gaseous mixture was measured. If D is the theoretica value of vapour density, variation of `alpha` with `D//d` is given by the graph below. What is value `D//d` at point A` ?

A

0

B

0.5

C

1

D

1.5

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The correct Answer is:
C
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