First Order Reaction MCQ - Practice Questions with Answers

Which of the following is the unit of rate constant for first order reaction?

  can be taken as the time taken for the concentration of a reactant to drop to 3/4 of its initial value. If the rate constant for a first order reaction is the    can be written as

The rate equation for the reaction is found to be : rate The correct statement in relation to this reaction is that the

Units of the rate constant of first and zero-order reactions in terms of molarity M unit are respectively.

A bacterial infection in an internal wound grows as $N^{\prime }(t)=N_o\exp (t)$, where the time $t$ is in hours. A dose of antibiotic, taken orally, needs 1 hour to reach the wound.

Once it reaches there, the bacterial population goes down as $\frac{dN}{dt}=-5N^2$.
What will be the plot of $\frac{N_o}{N}$ vs. t after 1 hour?

The decomposition of phosphine (PH₃) on tungsten at low pressure is a first-order reaction. It is because the

Select the reaction which does not follow the first order Kinetics:

If we start a reaction from 100 mol, the rate constant is $0.0693{\min }^{-1}$. What will be the rate of the reaction offer 20 min?

Which of the following reactions is first order reaction?

Which of the following correctly represents the first-order reaction?