Chemistry Question Bank

Decomposition of ammonium nitrite is an example of

The number of reacting species (atoms, ions or molecules) taking part in an elementary reaction, which must collide simultaneously in order to bring about a chemical reaction is called …A… of a reaction Here, A refer to

The following mechanism has been proposed for a reaction. 2P Q R S P Q T R Slow P T R fast -> -> -> The rate law expression for the reaction is (a) r k P Q (b) r k P (c) r k P T (d) r k P Q

For a reaction, 2NO 2H N 2H O, -> the possible mechanism is 2NO N O slow N O H N O H O -> fast N O H N H O -> What is the rate law and order of the reaction? (a) Rate = [N2O2], order =

The chemical reaction, proceeds as O O [O] (fast) [O] O 2O -> (slow) The rate law expression will be

In the sequence of reaction k k k A B C D -> -> -> k3 > k2 > k1, then the rate determining step of the reaction is :

The overall rate of the reaction is controlled by the ______ step in a reaction. Choose the suitable word to fill the blank.

For the reaction 2A + B ⟶ D + E the following mechanism has been proposed : A + B ⟶ C + D (slow) A + C ⟶ E (fast) The rate law expression for the reaction is

…A… reactions involves a sequence of elementary reactions in the formation of product. Here, A refers to

The reactions taking place in one step are called …A… reactions. Here, A is

In a first-order reaction A B -> , if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is. (AIPMT 2007)

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately. (AIPMT 2007)

According to collision theory of reaction rates, the rate of reaction depends

The rates of reactions increase with increase of temperature because

What will happen, on increasing the temperature or decreasing the activation energy (answer on the basis of Arrhenius equation)?

In the Arrhenius equation, a E /RT k Ae , the factor a E /RT e corresponds to the

On the basis of Arrhenius equation mentioned in Above ques. consider the following statements. I.Ea is activation energy. II.Unit of Ea is J mol-1 III.R is gas constant. Which of these are true statements?

In Arrhenius equation mentioned in Above Ques. ‘A’ is

The correct form of Arrhenius equation is (a) a E /RT k Ae (b) a RT/E k Ae (c) a E /RT k Ae (d) a RT/E k Ae

The first order rate constant for a certain reaction increases from 1.667 × 10–6 s–1 at 727ºC to1.667 × 10–4 s–1 at 1571ºC. The rate constant at 1150ºC, assuming constancy of activation energy over the given temperatu…

The rate constant of a reaction is given by ln k (sec–1) = 14.34 – (1.25 × 104)/T What will be the energy of activation?

The rate of reaction is doubled for every 10ºC rise in temperature. The increase in rate as result of increase in temperature from 10ºC to 100ºC is

For a chemical reaction with rise in temperature by 10oC, the rate constant is nearly …A…, Here, A refers to

Most of the chemical reactions are accelerated by …A… in temperature. Here, A refers to

The initial concentration of N2O5 in the following order reaction, N O g 2NO g g -> was 1.24 10 molL x at 318 K. The concentration of N2O5 after 60 min was 0.20 × 10-2 mol L-1. Calculate the rate constant of the…