Top 250+ Solved Physical Pharmaceutics 2 MCQ Questions Answer
Q. In a chemical reaction, the rate constant is independent of the initial concentration. Which one ofthem is the order?
a. first
b. second
c. third
d. zero
Q. Chemical kinetics is the study of the
a. rate of chemical reactions
b. particle size
c. rheological property
d. interfacial tension
Q. Rate of reaction is the
a. number of reactant molecules or atoms that take part in chemical reactions to give the products.
b. sum of exponents or powers of concentration terms in the rate equation
c. time required for reactant concentration to decrease to 90% of the initial concentration.
d. speed at which chemical reaction takes place
Q. When rate is independent of the reactant concentration, then it is called
a. zero order reaction.
b. Pseudo zero order reaction
c. First order reaction
d. Second order reaction
Q. In the equation, Rate = k[C]c[D]d, the order of the above reaction is
a. k
b. C + D
c. [C] *[D]
d. c + d
Q. Which of the following is the half life of zero order reaction
a. t1/2 = Ao/2k
b. t1/2 = 0.693/2k
c. t1/2 = Ao/2
d. t1/2 = 2k/ Ao
Q. The unit of k for zero order reaction is
a. moles/litre/second
b. moles
c. moles/second
d. moles/litre
Q. Which of the following is the half life of first order reaction
a. t1/2 = A0/2k
b. t1/2 = 0.693/2k
c. t1/2 = 2k
d. t1/2 = 0.693/k
Q. The unit of rate constant for second order reaction is
a. litre.mole-2 sec-2
b. litre.mole-2 sec-1
c. litre
d. litre.mole-1 sec-1
Q. Which of the following method/s used for determination of order of reaction?
a. Graphic method
b. Substitution method
c. Half life method
d. All of the above -
Q. The accelerated stability studies are primarily used to determine:
a. energy of the activation of the reaction
b. k value at elevated temperatures
c. k value at the room temperature
d. shelf life of the product
Q. In general, reaction rate constants in neutral pH are comparatively:
a. equal
b. higher
c. lower
d. zero
Q. The expiry date for a tablet is not mentioned on the label. It means that the expiry time in years is:
a. five years
b. nil
c. three years
d. two years