Rate of Chemical Reaction

IMPORTANT

Rate of Chemical Reaction: Overview

This Topic covers sub-topics such as Rate of a Chemical Reaction, Threshold Energy, Negative Catalysis, Positive Catalysis, Slow and Fast Reactions, Effect of Temperature on Rate of a Reaction and, Effect of Concentration of Reactants on Rate of a Reaction

Important Questions on Rate of Chemical Reaction

HARD
IMPORTANT

  A+2B 3C+2D.

The ratio of disappearance of B is   1× 10 2 mol/L/S.  The rate of reaction and  rate of change in concentration of A and C would be:

MEDIUM
IMPORTANT

The quantitative estimation of change in the rate of reaction with change in concentration does not always follow stoichiometric equation. Justify.

EASY
IMPORTANT

If Kc for the formation of HI from H2 and I2 is 48, then Kc for decomposition of 1 mole of HI is _____.

A =0.144B =1.144C =0.014

Enter your correct answe as A, B or C.

EASY
IMPORTANT

In the reaction A+BC, r=k[A], if [A] is increased by three times then the difference in the rate is _____ of the initial rate.

HARD
IMPORTANT

KClO3 + 6FeSO4 + 3H2SO4  KCl + 3Fe2(SO4)3 + 3H2O

The above reaction was studied at 300 K by monitoring the concentration of FeSO4 in which initial concentration was 10 M and after half an hour became 8.8 M. The rate of production of Fe2(SO4)3 is _______ × l06 mol L1 s 1

(Nearest integer)

MEDIUM
IMPORTANT

If the following reaction A2B+C, rate constant is 0.0002 Ms-1. If we start with 2 M of A then Conc. of B after ten minutes is 

HARD
IMPORTANT

At high temperatures, ethyl chloride produces HCl and ethylene by the following first order reaction:

CH3CH2Cl --> HCl + C2H4

In an experiment, when the initial concentration of ethyl chloride was 0.01 M, the rate of the reaction was found to be 1.6 × 10-8 m/s. What will be the rate of reaction if the initial concentration of ethyl chloride is 0.07 M?

MEDIUM
IMPORTANT

In the reaction : A+2B3C+2D, the rate of disappearance of B is 2×10-2 mol L-1 s-1. Find the rate of appearance of C.

MEDIUM
IMPORTANT

In the reaction : A+2B3C+2D, the rate of disappearance of B is 2×10-2 mol L-1 s-1. Find the rate of reaction.

MEDIUM
IMPORTANT

The rate of reaction for AProducts is 10 moles/lit/minute when t1=2 min. The rate of reaction when t2=12 min, in the same unit is ;

HARD
IMPORTANT

For an elementary reaction sequence shown, which of the following equation is correct?

Question Image

EASY
IMPORTANT

The reaction, 2NOg+Cl2g2NOClg is carried out in a closed vessel. if partial pressure of NO is decreasing at the rate of 180 torr/min. what is the rate of change of total pressue of vessel (in torr/min)

MEDIUM
IMPORTANT

In the process nA(g)mB(g) rate of disappearance of A is 5 ×10-3M min-1 & rate of appearance of B is 10-2 M min-1 at same instant. Then values of n & m respectively are

MEDIUM
IMPORTANT

For the reaction, 2NH3N2+3H2, it is observed that

-dNH3dt=K1NH3 ; +dN2dt=K2NH3 and +dH2dt=K3NH3

The correct relation between K1, K2 and K3 is :

EASY
IMPORTANT

For a reaction 2A + B  3Z, if the rate of consumption of A is 2 ×10-4 mol dm-3s-1 , the rate of formation of Z will be

HARD
IMPORTANT

Consider the reaction :

KClO3+6FeSO4+3H2SO4KCl+3Fe2SO43+3H2O 

If concentration of FeSO4 decreases from 0.9 M to 0.3 M in 10 second, the rate of formation of KCl is in the above reaction would be (In M sec-1).

EASY
IMPORTANT

Which of the following statement is correct for a reaction X+2Y  Products

EASY
IMPORTANT

For the reaction C12H22O11+H2O     H+          C6H12O6+C6H12O6, write the rate of reaction expression.

EASY
IMPORTANT

Rate of reaction is the change in concentration of any one of the reactants or any one of the products in unit time. Express the rate of the following reaction in terms of reactants and products:

2HI                H2+I2

EASY
IMPORTANT

Write any four differences between 'rate of reaction' and 'rate constant' of a reaction.