Question

$3A \rightarrow B + C$, it would be a zero order reaction when
(a) the rate of reaction is proportional to square of concentration of A
(b) the rate of reaction remains same at any concentration of A
(c) the rate remains unchanged at any concentration of B and C
(d) the rate of reaction doubles if concentration of B is increased to double

Answer 1

(a) the rate of reaction is prportional to the square of concentration at A
(d) the rate of reaction doubles if the concentration of B is increased to double.

I don't sure about this answer.