# Mechanism of a hypothetical reaction X2+Y2⟶2XY, is given below :

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Mechanism of a hypothetical reaction $\require{mhchem}\ce{X2 + Y2 -> 2XY}$, is given below :

(i) $\ce{X2 -> X + X}$ (fast)

(ii) $\ce{X + Y2 \rightleftarrows XY + Y}$ (slow)

(iii) $\ce{X + Y -> XY}$ (fast)

The overall order of the reaction will be

(a) 2

(b) 0

(c) 1.5

(d) 1

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