Question

For a certain reaction, a plot of $\frac{[C_0-C]}{C}$ against time t, yields a straight line. $C_0$ and C are concentration of reactant at $t=0$ and $t=t$ respectively. The rate of reaction is:

• A. 3
• B. 0
• C. 1
• D. 2

Answer 1

The correct option is D 2

As we know, for second-order reaction:

$\frac{-d{c}_A}{dt}=k[C_A{]}^2$

We get $\frac{1}{C}=k\times t+\frac{1}{C_0}$

$\frac{C_0-C}{C_0-C}=k\times t$

$\frac{C_O-C}{C}=k\times C_0\times t$

So it is a second-order reaction.