Chemistry Question Bank

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

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…

For the reaction R P, -> the concentration of a reactant changes from 0.03 M to 0.02 M in 25 min. Calculate the average rate of reaction using units of time in seconds.

In a reaction, 2A ->products, the concentration of A decreases from 1.0 mol L-1 to 0.8 mol L-1 in 20 min. Calculate the rate during this interval.

Assertion (A) Δ[R] is multiplied with -1 to make the rate of the reaction a positive quantity. Reason (R) Δ[R] is a negative quantity in the expression rate of disappearance of R R t

Rate of a reaction can be expressed as I. The rate of decrease in concentration of any one of the reactants. II. The rate of increase in concentration of any one of the products. Which of the above mentioned statement…

The rate of formation of ammonia by the reaction : N2 + 3 H2 ⟶ 2 NH3 is expressed as d[NH ] dt = 2.5 × 10–4 mol L–1 s–1 . The rate of consumption of H2 expressed as d[H ] dt will be

For the reaction 4NH 5O 4NO 6H O, -> if the rate of disappearance of NH3 is 3.6 × 10–3 mol L-1 s–1, what is the rate of formation of H2O?

Similarly, the stoichiometric coefficient of D, A and B is 3,4 and 1 respectively. Thus using the concept, B D A C -> So, answer b is correct.

The rate of a reaction is expressed in different ways as follows : 1 d[C] 1 d[D] 1 d[A] d[B]. 2 dt 3 dt 4 dt dt The reaction is

For a hypothetical reaction, R -> products; rate k R . The negative sign used in the rate expression indicates

Choose the correct value of d NH dt for the reaction, N 3H 2NH -> (a) d H dt (b) d H dt (c) d N dt (d) d N dt Ans. (a) Sol. d NH d H dt dt

In order to express the rate at a particular moment of time we determine the …A… rate. Here A refers to

When the concentrations of gases is expressed in terms of their partial pressures, then the units of the rate of reaction will be

Find the value of from the graph shown below (a) av R r f (b) av R R r t t (c) av d R r dt (d) av R R r t t Ans. (d) Sol. av R R r t t

In the graph, slope is (a) inst d R r dt (b) inst d R r d P (c) inst d P r dt (d) inst d P r dt Ans. (c) Sol. Slope ⇒ inst d P r dt

...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