Moderate

If Ef and Er are activation energies of forward and reverse reaction and the reaction is known to be exothermic then,

Correct answer: B. Ef < Er

  • A. Ef > Er
  • B. Ef < Er
  • C. Ef >>> Er
  • D. Ef = Er

Explanation

The answer is Ef < Er. An exothermic reaction is a reaction that releases heat. This means that the products of the reaction have a lower energy than the reactants.

Last updated

About Reaction Kinetics

Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.

Practise Reaction Kinetics

573 free Reaction Kinetics MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Chemistry questions like this

Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Related questions