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Chemistry-

General

Easy

Question

A mixture of $N subscript 2 end subscript$ and $H subscript 2 end subscript$ in the mole ratio 1:3 is allowed to attain equilibrium when 50% of mixture has reacted. If $P$ is the equilibrium pressure, then partial pressure of $N H subscript 3 end subscript$ formed is:

$P / 6$
$P / 2$
$P / 3$
$P / 4$

The correct answer is: $P divided by 3$

$blank N subscript 2 end subscript plus 3 H subscript 2 end subscript rightwards harpoon over leftwards harpoon 2 N H subscript 3 end subscript$

∴ 50% mixture reacts
∴ $1 minus x plus 3 minus 3 x equals fraction numerator 4 over denominator 2 end fraction equals 2$
$x equals 0.5$

$equals fraction numerator P blank cross times blank 2 blank cross times blank 0.5 over denominator open parentheses 4 minus 0.5 blank cross times blank 2 close parentheses end fraction equals fraction numerator P over denominator 3 end fraction$

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