Free Order of Reaction MCQs with Answers
33 Order of Reaction MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Reaction order shows how the rate depends on the concentration of each reactant, as expressed in the rate law. Coverage includes zero, first and second-order reactions, integrated rate equations, half-life, units of rate constants and the distinction between overall order and molecularity.
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33 questions · page 2 of 2
- A. 2nd
- B. 3rd
- C. 1st
- D. Zero
Explanation: It is second order reaction. Ozone reacts readily with nitric oxide to yeild nitrogen dioxide and oxygen
Correct answer: 2nd- A. 1st order reaction
- B. 2nd order reaction
- C. Negative order of reaction
- D. Zero order of reaction
Explanation: The rate of reaction is inversely proportional to the concentration of the reactant in a second-order reaction (option b).
Correct answer: 2nd order reaction- A. a x b
- B. a - b
- C. b - a
- D. a + b
Explanation: The exponents a+b represents the order of reaction.
Correct answer: a + b- A. Direction of reaction
- B. Extent of reaction
- C. Order of reaction
- D. Temperature of reaction
Explanation: Option C "Order of Reaction " is the correct answer. Order of reaction may be defined as the number of molecules or reactants…
Correct answer: Order of reaction- A. Second order
- B. Zero order
- C. First order
- D. Third order
Explanation: In a second-order reaction, the relationship between half-life and concentration is such that the half-life is inversely proportional to…
Correct answer: Second order- A. Number of reactant molecules
- B. Number of moles of reactants
- C. Number of moles of products
- D. Order of Reactions
Explanation: The formula for the half-life of a reaction, t1/2 = 1 / [A(a(n-1))], includes the term (n-1), where n represents the order of the reaction.
Correct answer: Order of Reactions- A. It's in excess
- B. It's a solvent
- C. It's a solute
- D. Both A and B
Explanation: A Pseudo first-order reaction can be defined as a second-order or bimolecular reaction that is made to behave like a first-order reaction.
Correct answer: Both A and B28. The number of reacting molecules which changes their concentration in a chemical change is called:
- A. Extent of a reaction
- B. Order of a reaction
- C. Specific rate of a reaction
- D. Enthalpy of reaction
Explanation: The Order of reaction refers to the relationship between the rate of a chemical reaction and the concentration of the species taking part…
Correct answer: Order of a reaction- A. 2
- B. 0
- C. 1
- D. 3
Explanation: The given chemical reaction is: Rate = k[NO][O3] The order of a chemical reaction with respect to a specific reactant is determined by the…
Correct answer: 2- A. Conditions of temperature
- B. Initial Concentration of the compound
- C. Presence of Catalyst
- D. All of these
Explanation: Half-life ( t1/2t1/2 ) is a timescale on which the initial population is decreased by half of its original value notice that, for…
Correct answer: Initial Concentration of the compound- A. Fractional Order
- B. Pseudo First Order
- C. First Order
- D. Second Order
Explanation: Explanation:The reaction is pseudo first order. Water is in excess as it is the solvent as a result will not affect the reaction order.
Correct answer: Pseudo First Order- A. Concentration of the product
- B. Concentration of the reactant
- C. Temperature of the reaction
- D. Surface area of the product
Explanation: In zero-order reactions, the rate is independent of the concentration of the reactants.
Correct answer: Concentration of the reactant- A. Bimolecular
- B. Unimolecular
- C. Trimolecular
- D. Tetramolecular
Explanation: The molecularity of a reaction is defined as the number of reacting molecules that collide simultaneously to bring about a chemical…
Correct answer: Bimolecular