Rates Of Chemical Reactions And Chemical Kinetics QUESTIONS AND ANSWERS

IIT JEE : Rates Of Chemical Reactions And Chemical Kinetics QUESTIONS AND ANSWERS :: part2 : 21 to 25

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

21.The dimensions of rate constant for a first order reaction involve

Time and concentration

Time only

Concentration only

Neither time nor concentration.

22.Which of the following statement is false?

Fast reactions have low activation energy.

Activation energy of a reaction depends on the chemical nature of reactants and products.

With increase in temperature the rate of reaction decreases in case of exothermic reactions

A catalyst increases the rate of reaction by decreaseing the activation energy of the reaction.

23.The power to which the concentration of a substance appears in the rate expression is called

order of reaction

rate of reaction

molecularity of reaction

order of reaction w.r.t. that substance

24.Which of the following factors does not influence the reaction rate?

Molecularity of the reaction

Orientation of molecules

Concentration of reactant

Order of reaction

25.If marbles are grounds to a fine powder then the reaction of marble with hydrochloric acid is completed in a few seconds because

more particles are exposed for reaction

reduction in particles size results in the liberation of heat

concentration of marbles increases

surface of marble become rough

More Rates Of Chemical Reactions And Chemical Kinetics QUESTIONS AND ANSWERS available in next pages

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