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Order of Reaction

Diazonium sal...

Question

Diazonium salt decomposes as
$C_{6} H_{5} N_{2}^{\oplus} C l^{⊖} \to C_{6} H_{5} C l + N_{2}$
At $0^{\circ}$ , the evolution of $N_{2}$ becomes two times faster when the initial concentration of the salt is doubled. Thus, order of reaction is :

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Solution

$r_{1} = k [s a l t]^{n}$
$r_{2} = 2 r_{1} = k [2 s a l t]^{n}$
$\frac{2 r_{1}}{r_{1}} = (2)^{n}$
$(2)^{1} = (2)^{n}$
n = 1.

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