Question

Taking the reaction $x+2y\to$ prodcuts, to be of second order, which of the following are the rate law expressions for the reaction :

(I) $\frac{dx}{dt}=K\left[x\right]\left[y\right]$ (II) $\frac{dx}{dt}=K\left[x\right][y{]}^2$

(III) $\frac{dx}{dt}=k{\left[x\right]}^2$ (IV) $\frac{dx}{dt}=K\left[x\right]+K{\left[y\right]}^2$

• A. I only
• B. I and III only
• C. I and II only
• D. I and IV only

Answer 1

The correct option is B I and III only

In option $Iorder=2$

In option $IIorder=3$

In option $IIIorder=2$

In option $IVorder=3$

Option B is correct for the reaction $x+2y\to product$ for $II$ order reaction.