1. The exothermic Chemical reaction which is exothermic AB→A + B is increased by?
A) Increasing the temperature.
B) decrease the reactant concentration
C) Adding an inhibitor.
D) Reducing the dimensions of an amino acid yardstick.
Answer: A) Increasing the temperature.
2. Which one of the following is a correct statement for activation energy?
A) Energy released during a reaction
B) Indirect Energy- it needs to manufacture products.
C) It is the lowest energy needed for a reaction to take place.
D) The energy to break bonds in the products
Answer: C) It is the lowest energy needed for a reaction to take place.
3. In the rate law expression Rate=k[A][B]2\text{Rate} = k[A][B]^2Rate=k[A][B]2, what happens to the rate if the concentration of B is doubled?
A) It remains the same.
B) It doubles.
C) It quadruples.
D) It halves.
Answer: C) It quadruples.
4. For the reaction 2NO2(g)→2NO(g)+O2(g)2NO_2(g) \rightarrow 2NO(g) + O_2(g)2NO2(g)→2NO(g)+O2(g), the rate law is given by Rate=k[NO2]2\text{Rate} = k[NO_2]^2Rate=k[NO2]2
If the concentration of NO2NO_2NO2 is increased by a factor of 3, how will the rate change?
A) The Price Will Increase Six-Fold
B) The rate will increase in a ratio of (9.)
C- The rate would be multiplied by a factor of 3.
D) The rate stays the same
Answer: B) The rate will increase in a ratio of (9.)
5. The Catalyst provides which of the following roles in a catalyzed reaction?
A) Increase in enthalpy for the reaction.
B) Lower the activation energy.
C) Reduce the activation energy.
(D) Shift the equilibrium to products.
Answer: C) Reduce the activation energy.
6. The answer to this question is: oh wait, we’re going to change that to “For a zero-order table?
A) The rate of reaction is directly proportional to the concentration of the reactant
B) The rate of reaction is independent of the concentration of the reactant.
C) And along with the consumption of the reactant, the reaction rate increases.
D CReaction rate is not dependent on the concentration of reactant.
Answer: B) The rate of reaction is independent of the concentration of the reactant.
7. Which rate law is First order concerning?
A) Rate=k[A]2[B]
B) Rate=k[A][B]
C) Rate=k[A][B]2
D) Rate=k[A]2[B]2
Answer: C) Rate=k[A][B]2
8. What is the overall order of the reaction with the rate law Rate=k[A]1[B]2\text{Rate} = k[A]^1[B]^2Rate=k[A]1[B]2?
A) Zero.
B) One.
C) Two.
D) Three.
Answer: D) Three.
9. First order reactions 1-Observation 2- half-life ‘t0.5’ 3, what is the rate constant k?
A) 0.0693 min−10.0693
B) 0.1 min−10.1
C) 0.693 min−10.693
D) 0.0231 min−10.0231
Answer: A) 0.0693 min−10.0693
10. For a second-order reaction to a single reactant, the units of the rate constant K are:
A) M s−1M
B) s−1s^{-1}s−1
C) M−1 s−1M^{-1}
D) M−2 s−1M^{-2}
Answer: C) M−1 s−1M^{-1}
11. The rate law for a reaction is found to be Rate=k[A]2\text{Rate} = k[A]^2Rate=k[A]2. What effect does doubling the concentration of AAA have on the rate?
A) The rate will double.
B) The rate will triple.
C) The rate will quadruple
D) Stays the same
Answer: C) The rate will quadruple
12. Half-life of a Second Order Reaction Module 1 · Chemistry Kinetics over Video
A) t1/2=0.693/k
B) t1/2=1/k[A]
C) t1/2=1k[A]2
D) t1/2=k/[A]
Answer: B) t1/2=1/k[A]
13. The first-order example of this is the difference between a reaction’s first integrated rate law as you would write it out.
A) [A]=[A]0−kt[A]
B) ln[A]=−kt+ln[A]0
C) 1[A]=kt+1[A]0
D) ln[A]=ln[A]0+12kt
Answer: B) ln[A]=−kt+ln[A]0
14. Which is the following A > B → FIGURE 2) Sum of order=post_first_order + post_second_orderA and B→C reaction schemes of first order for.
A) First order.
B) Second order.
C) Third order.
D) Fourth order.
Answer: C) Third order.
15. Or respond to not orderRowAtIndexPath 𝐴, more concentrated AIf [A] goes up, will the reaction go faster? A is doubled?
A) It will double.
B) It will remain the same.
C) It will quadruple.
D) It will decrease.
Answer: B) It will remain the same.
16. Which of the following is correct regarding catalysts?
A) Catalysts are used up in the reaction.
B) Catalysts reduce the activation energy of a reaction
C) Catalysts lower the change in Gibbs free energy of a reaction
D)Catalysts change the position of equilibrium for a reaction.
Answer: B) Catalysts reduce the activation energy of a reaction
17. Which of the following factors will not affect the rate of a chemical reaction?
A) Temperature.
B) Reactant concentrations.
C) Catalyst (just depends if you have any catalysts or not).
D) the reactants are a particular colors:
Answer: D) The color of the reactants.
18. What How the first-order integrated rate law look like?
A) ln[A]=−kt+ln[A]0
B) [A]=[A]0−kt
C) 1[A]=kt+1/[A]0
D) [A]=[A]0⋅e−kt
Answer: A) ln[A]=−kt+ln[A]0
19. But why does activation energy increase as temperature increases?
A) activation energy decreases with increasing temperature
B) activation energy = temperature independent
C)Temperature Decrease, Activation energy Increase
D) Temperature is a square of the activation energy.
Answer: B) Activation energy = temperature independent
20. The rat restriction site f a reaction mechanism i:!
A)Rate of slowest step in the reaction
B) The step with the highest activation energy.
C)The step with the lowest Ea
D) Final step of the process.
Answer: B) The step with the highest activation energy.