Order Of Reaction-Multiple Choice Questions Quiz

Question 1: What does the order of reaction represent?

(a) The sequence of steps in a chemical reaction
(b) The speed at which a reaction occurs
(c) The arrangement of reactants and products
(d) The exponent of concentration terms in the rate equation

Question 2: In a zero-order reaction, the rate of reaction is:

(a) Directly proportional to the concentration of reactants
(b) Inversely proportional to the concentration of reactants
(c) Independent of the concentration of reactants
(d) Proportional to the square of the concentration of reactants

Question 3: For a first-order reaction, the rate constant has units of:

(a) M/s
(b) M^-1 s^-1
(c) s^-1
(d) M^-2 s^-1

Question 4: The overall order of a reaction is determined by:

(a) Adding the orders of all reactants
(b) Averaging the orders of all reactants
(c) Taking the highest order of any reactant
(d) Taking the lowest order of any reactant

Question 5: Which order of reaction is characterized by a graph of concentration vs. time that results in a straight line?

(a) Zero-order
(b) First-order
(c) Second-order
(d) The order does not affect the graph shape

Question 6: A second-order reaction has a rate equation of:

(a) Rate = k[A]
(b) Rate = k[A]^2
(c) Rate = k
(d) Rate = k[B]

Question 7: If the concentration of a reactant is doubled in a first-order reaction, how does the rate of reaction change?

(a) The rate is halved
(b) The rate is doubled
(c) The rate remains the same
(d) The rate is quadrupled

Question 8: What is the sum of the exponents of the concentration terms in a rate equation called?

(a) Rate constant
(b) Reaction order
(c) Rate order
(d) Rate coefficient

Question 9: The half-life of a reaction is independent of its:

(a) Rate constant
(b) Initial concentration
(c) Temperature
(d) Reaction order

Question 10: Which type of reaction order is rarely observed due to its complexity in real-world reactions?

(a) Zero-order
(b) First-order
(c) Second-order
(d) Fractional-order

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Total score: /10

Answer key:

Question 1: d

Question 2: c

Question 3: c

Question 4: a

Question 5: b

Question 6: b

Question 7: b

Question 8: b

Question 9: b

Question 10: d