Top 50+ Solved Drug Stability - Chemical Kinetics MCQ Questions Answer
Q. The units for the specific rate constant for a second order reaction are:
a. liter/moles.sec
b. liter.sec/moles
c. moles/liter.sec
d. moles.sec/liter
Q. The half life of a first order reaction is 4 years. What is its shelf life (in years)?
a. 0.02
b. 0.03
c. 0.17
d. 0.61
Q. Which one of the following dosage forms exhibit faster rate of reaction under normal conditions?
a. emulsions
b. ointments
c. solutions
d. suspensions
Q. In chemical kinetics, the rate of a reaction is expressed as (-dc/dt), where dc refers to theconcentration. Whose concentration does it refer to?
a. catalyst
b. product
c. reactant
d. solvent medium
Q. Which one of the following can be designated as the molecularity of a reaction?
a. half
b. one
c. one and half
d. zero
Q. Which one of them is refered as a general rate equation (-dc/dt) for a second order?
a. A°B°
b. A1B1
c. A1B2
d. A2B2
Q. Which-one of the following orders have abundant applications in biological processes?
a. first
b. second
c. third
d. zero
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