Quiz for Rate laws

Q1: The rate law for a reaction is Rate = k[A]^2[B]. What is the order of the reaction?

A. 1 B. 2 C. 3 D. 4

Q2: If the rate of a reaction doubles when concentration of A is doubled, the order with respect to A is?

A. Zero B. One C. Two D. Three

Q3: Which of the following units represent the rate constant for a first-order reaction?

A. mol L⁻¹ s⁻¹ B. s⁻¹ C. mol⁻¹ L s⁻¹ D. L mol⁻¹ s⁻¹

Q4: Rate = k[A][B]^2. What will happen to the rate if [B] is halved?

A. Rate is halved B. Rate is unchanged C. Rate becomes 1/4th D. Rate doubles

Q5: Rate = k[A]^0[B]^1. What is the order of the reaction?

A. 0 B. 1 C. 2 D. 3

Q6: In a reaction A → B, the rate remains constant with time. What is the order?

A. Zero B. One C. Two D. Three

Q7: If doubling [A] quadruples the rate, what is the order with respect to A?

A. 1 B. 2 C. 3 D. 0

Q8: The half-life of a first-order reaction depends on?

A. [A]₀ B. Temperature C. Both A and temperature D. None

Q9: Unit of rate constant for zero-order reaction is?

A. mol⁻¹ L⁻¹ s⁻¹ B. mol L⁻¹ s⁻¹ C. s⁻¹ D. L mol⁻¹ s⁻¹

Q10: Rate = k[A][B]. If [A] is tripled and [B] is doubled, rate increases by?

A. 3x B. 6x C. 9x D. 12x

Q11: Order of reaction is determined by?

A. Stoichiometry B. Experimental data C. Rate of product formation D. Rate of reactant consumption

Q12: In a second-order reaction, unit of k is?

A. mol L⁻¹ s⁻¹ B. s⁻¹ C. mol⁻¹ L s⁻¹ D. L² mol⁻² s⁻¹

Q13: Rate of reaction is defined as?

A. Change in concentration/time B. Time/concentration C. Concentration × time D. Rate constant

Q14: If t½ of a reaction is independent of [A], it is?

A. Zero order B. First order C. Second order D. Third order

Q15: What is the slope of ln[A] vs time in first-order reaction?

A. -k B. k C. 1/k D. k²

Q16: For a zero-order reaction, the plot of [A] vs time is?

A. Straight line B. Parabola C. Hyperbola D. Exponential

Q17: Rate of reaction depends on?

A. Temperature B. Pressure C. Catalyst D. All of these

Q18: Activation energy is defined as?

A. Energy to start reaction B. Energy at equilibrium C. Energy of products D. Energy of reactants

Q19: Arrhenius equation is?

A. k = Ae^(Ea/RT) B. k = Ae^(-Ea/RT) C. k = A + EaRT D. k = Ae^(RT/Ea)

Q20: In a first-order reaction, if k = 0.693/s, the half-life is?

A. 1 s B. 0.693 s C. 2 s D. 10 s