Chemistry Question Bank

For the reaction, 4P Q 2R 2S, -> Which of the following statement(s) is/are true? I. Rate of appearance of S is double the rate of the disappearance of Q II. Rate of disappearance of Q is one fourth the rate of disa…

The decomposition of N2O5 in CCl4 at 318 K has been studied by monitoring the concentration of N2O5 in the solution. Initially the concentration of N2O5 is 1.16 mol L-1 and after 92 min, it is reduced to 1.04 mol L-1.…

In the reaction given below 2HI g H g I g -> hoose the correct alternative.

Consider the following statements regarding the equation given below, Hg l Cl g HgCl s -> I.Stoichiometric coefficients of the reactants and products are same in the above reaction. II.Rate of reaction Hg Cl…

...A… depends upon the change in concentration of reactants or products and the time taken for that change to occur. Here, A is

The correct expression is

The square brackets in the expression Δ[R] = [R]2 – [R]1 are used to express …A… Here, A is

Speed of a reaction can be defined as

The units of rate of reaction are

Rate of a reaction

The rate of reaction is defined as

For a reaction R ⟶ P, the concentration of a reactant changes from 0.05 M to 0.04 M in 30 minutes. What will be the average rate of reaction in minutes?

For the reaction A + 2B ⟶ C, the rate of reaction at a given instant can be represented by (a) d[A] 1 d[B] d[C] dt 2 dt dt

For the reaction. 2 HI ⟶ H2 + I2, the expression [ ] d HI dt represents

In a reaction 2HI ⟶ H2 + I2, the concentration of HI decreases from 0.5 mol L–1 to 0.4 mol L–1 in 10 minutes. What is the overall rate of reaction during this interval?

Consider the reaction, 2N O 4NO O . -> In the reaction NO2 is being formed at the rate of 0.0125 mol L–1 s–1. What is the rate of reaction at this time?

Chemical kinetics plays an important role in

Collision theory is used to explain how chemical species undergo a reaction. Using this theory and the kinetic molecular model, which of the following does NOT influence the rate of a chemical reaction?

Choose the correct answer out of the following choices. Assertion (A): Most people think diamond is forever. Reason (R): Conversion rate of diamond to graphite is very low.

Assertion (A): In rate law, unlike in the expression for equilibrium constants, the exponents for concentrations do not necessarily match the stoichiometric coefficients. Reason (R): It is the mechanism and not the ba…

Assertion (A): The order of a reaction can have fractional value. Reason (R): The order of a reaction cannot be written from balanced equation of a reaction.

Assertion (A): If the activation energy of a reaction is zero, temperature will have no effect on the rate constant. Reason (R): Lower the activation energy, faster is the reaction.

The instantaneous rate of reaction at the beginning of the reaction is

The rate of formation of NO2 during the period 600 – 700 s is

Which of the following statements is false?