Chemistry Question Bank

If ‘a’ is the initial concentration of the reactant, the time taken for completion of the reaction, if it is of zero-order, will be

For a general reaction X -> Y, the plot of conc. of X vs time is given in the figure. What is the order of the reaction and what are the units of rate constant?

The rate constant of a first order reaction is 15 ×10-3 s–1. How long will 5.0 g of this reactant take to reduce to 3.0 g?

1.386 hours are required for the disappearance of 75% of a reactant of first-order reaction. What is the rate constant of the reaction?

When the rate of reaction is independent of the concentration of reactants, then the order of that chemical reaction is

I. Order of a reaction can be 0, 1, 2, 3…. II. Order of a reaction can never be a fraction. Which of the above statement(s) is/are true? Choose the correct option.

Order of a chemical reaction is defined as the

The rate of reaction A + B + C ⟶ Products is given by Rate = k [A]1/2 [B]1/3 [C] The order of the reaction is :

Order of a reaction can be

The reactions of higher order are rare because

The rate constant of a reaction is 2.5 × 10–2 minutes–1. The order of the reaction is

The rate of a reaction 2X + Y ⟶ Products is given by d[Y] dt = k [X]2 [Y] if X is present in large excess, the order of the reaction is :

For the reaction CH3COCH3 + I2 H ->Products, the rate is governed by the expression dx k dt [Acetone] [H+] The order w.r.t. iodine is

The rate law expression for the hypothetical reaction 2 A + 3 B ⟶ 2 C is = k [A] [B]2 The order of reaction is

For a single step reaction; A + 2 B ⟶ Products, the molecularity is

Which one of the following statements is incorrect about the molecularity of a reaction?

For a reaction X + Y ⟶ Z, rate[X]. What is (i) molecularity and (ii) order of reaction?

Which of the following statement is not true?

A reaction is of first order when

For a reaction pA + qB ⟶ products, the rate law expression is r = k [A]m [B]n then

Which of the following statement is/are correct? (a) A catalyst is used in the rate determining step of a mechanism, but then is formed again in some subsequent step so that there is no change in the concentration of …

Mark the correct statement.

Rate of a reaction depends upon

Under a given set of experimental conditions, with increase of concentration of the reactants, the rate of a chemical reaction

Contact process is used in the formation of sulphur trioxide, 2SO g O g 2SO g The rate of reaction can be expressed as O 2.5 10 molL s . t x Then rate of disappearance of [SO2] will be