Question
$$3A \to B + C$$ 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 :
the rate of reaction remains same at any concentration of $$A$$
Solution :
For reaction,
$$3A \to B + C$$
If it is zero order reaction, then the rate remains same at any concentration of $$A\,{\text{or}}\,\frac{{dx}}{{dt}} = k\left[ {{A^0}} \right]$$
$$\left[ {{A^0} = 1} \right].$$
It means that for zero order reaction, rate is independent of concentration of reactants.