19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The addition of a catalyst during a chemical reaction alters which of the following quantities? (NEET 2016)
For the reaction. 2 HI ⟶ H2 + I2, the expression [ ] d HI dt represents
The rate of reaction is defined as
Rate of a reaction
The units of rate of reaction are
Speed of a reaction can be defined as
The square brackets in the expression Δ[R] = [R]2 – [R]1 are used to express …A… Here, A is
The correct expression is
...A… depends upon the change in concentration of reactants or products and the time taken for that change to occur. Here, A is
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…
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
Under a given set of experimental conditions, with increase of concentration of the reactants, the rate of a chemical reaction
Rate of a reaction depends upon
Mark the correct statement.
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 …
Statement I The rate law may not depend on the concentration of every reactants. Statements II With increase in temperature, the rate of reaction increases. Choose the correct option regarding above statements.
The rate law for a reaction between the substances P and Q is given by rate a b k P Q On doubling the concentration of P and reducing the concentration of Q to one-half, the ratio of the new rate to the earlier rate…
The unit of rate constant for a zero-order reaction is
The equilibrium constant of reaction is 20.0 At equilibrium, the rate constant of forward reaction is 10.0. The rate constant for backward reaction is
The unit of the rate constant of nth order is
For which of the following, the units of rate constant and rate of the reaction are same?
The rate of formation of a dimer in a second order dimerisation reaction is 9.1 × 10–6 mol L–1 s–1 at 0.01 mol L–1 monomer concentration. What will be the rate constant for the reaction?
Match the following Columns and choose the correct option from the codes given below. Column I (Reaction) Column II (Units of rate constant) A. Zero order reaction
molL molL s s molL x B. First order reaction
molL s s molL x C. Second order reaction