Question

Diazonium salt decomposes as
(BC,H,N,C1 → C,H,Cl +N,
At 0°C, the evolution of nitrogen becomes two
times faster when the initial concentration of
the salt is doubled therefore it is.
1) a first order reaction
2) a second order reaction.
3) independent of the initial concentration of the
salt.
4) a zero order reaction​

Answer 1

Diazonium salt decomposes as:

C₆H₅N₂Cl → C₆H₅Cl + N₂

Since, rate becomes two times faster when initial concentration of salt is doubled, rate varies directly with the concentration of salt

rate = k[C₆H₅N₂Cl ]ⁿ

rate ∝ [C₆H₅N₂Cl ]ⁿ

2r₁ = r₂, when [C₆H₅N₂Cl ]₂ = 2[C₆H₅N₂Cl ]₁

Thus, n = 1

Thus, order = 1

it is a first order reaction