StudentAidUnit 7: Unit 7: Reaction Kinetics — Mcqs
11th Class Chemistry · Unit 7: Reaction Kinetics
0 of 0 answered
0 correct
1.The rate of reaction:
2.Increasing the temperature of a chemical reaction increases the rate of a reaction because:
3.Consider two reactions with different activation energies at the same temperature. The reaction with the lower activation energy will have:
4.The order of a chemical reaction, that is dependent of concentration is:
5.On a Boltzmann distribution curve, the area under the curve represents:
6.On a Boltzmann distribution curve, the activation energy (Ea) is represented by:
7.If we double the concentration of a reactant, the rate increases by four times, the reaction is:
8.The rate determining step in a multi-step reaction is:
9.The reaction NO2(g)+CO(g) → NO(g)+CO2(g) occurs in two steps. What is the rate law equation for this reaction? 2NO2 → NO + NO3 (k1 slow) / NO3 + CO → CO2 + NO2 (k2 fast)
10.How does the presence of a catalyst affect the rate of a chemical reaction?
11.On an energy profile diagram, the presence of a catalyst is represented by:
12.The units of the rate constant (k) for a reaction depend on the:
13.A first-order reaction has a half-life (t1/2) of 20 minutes. What is the value of its rate constant (k)?
14.Effective collisions are those that:
15.Collision frequency depends on:
16.Which one reduces activation energy?
17.Rate of reaction is measured as:
18.Units of rate for gaseous reaction are:
19.Which of the following methods measures reaction rate?
20.In rate = ΔC/Δt, C refers to:
21.Rate is fastest:
22.A flat curve in rate vs time graph indicates:
23.Which factor affects rate of reaction?
24.Increase in surface area:
25.Effect of temperature on rate is:
26.In a chemical reaction, a catalyst:
27.Which increases with rise in temperature?
28.Higher pressure increases rate for:
29.Rate law is an expression involving:
30.Rate = k[A]^n defines:
31.Overall order is sum of:
32.A reaction is first-order if:
33.A zero-order reaction has rate:
34.Units of rate constant depend on:
35.Unit of rate constant for zero-order reaction is:
36.Unit of rate constant for first-order reaction is:
37.Unit of k for second-order reaction is:
38.For nth order reaction, unit of k is:
39.k has unit s^-1 for:
40.Which unit is common for all orders?
41.Rate constant can be determined by:
42.For gaseous reactions, rate is often monitored by:
43.In color change reactions, which method is best?
44.Reaction rate by conductometry depends on:
45.Rate constant is independent of:
46.First-order reactions are best studied using:
47.Half-life is time in which:
48.Half-life of first-order reaction:
49.Half-life of zero-order reaction is:
50.Half-life formula for 1st-order reaction is:
51.Which order has constant half-life?
52.Unit of half-life is:
53.The slowest step in a mechanism is:
54.A reaction mechanism describes:
55.Intermediates are:
56.Rate-determining step controls:
57.Mechanism supports:
58.Catalysts usually act in:
59.In energy profile diagram a catalyst:
60.Enzyme is a:
61.In an energy profile, peak represents:
62.Energy profile shows:
63.Homogeneous catalysts are in:
64.In presence of catalyst, ΔH:
65.A reaction is spontaneous when:
66.Gibbs free energy equation is:
67.At equilibrium, ΔG is:
68.Negative ΔH and positive ΔS implies:
69.ΔG tells about:
70.If ΔG = 0, the system is: