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Chemical Kinetics
JEE Chemistry • 10 questions • Free on ExamBattle
Practice Questions
Q1
The units of rate constant for a second-order reaction are:
- A. s⁻¹
- B. L mol⁻¹ s⁻¹
- C. mol L⁻¹ s⁻¹
- D. L² mol⁻² s⁻¹
Q2
The Arrhenius equation is k = Ae^(-Ea/RT). The factor A represents:
- A. Activation energy
- B. Frequency factor (pre-exponential)
- C. Gas constant
- D. Temperature
Q3
A catalyst increases the rate of reaction by:
- A. Increasing temperature
- B. Lowering activation energy
- C. Increasing concentration
- D. Changing equilibrium
Q4
For a first-order reaction, the time for 75% completion is:
- A. t₁/₂
- B. 2 × t₁/₂
- C. 3 × t₁/₂
- D. 4 × t₁/₂
Q5
The order of a reaction can be:
- A. Only integer
- B. Zero, integer, or fractional
- C. Only positive integer
- D. Only 1 or 2
Q6
In a zero-order reaction, the rate is:
- A. Proportional to concentration
- B. Independent of concentration
- C. Proportional to [A]²
- D. Zero
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