Top 250+ Solved Physical Pharmaceutics 2 MCQ Questions Answer
Q. In the study of the rate of a reaction, 100 ml of 0.1 N hydrochloric acid is added to 10 ml methylacetate for the reaction to occur. The reason for making such a proportion is to make:
a. analysis of degradation is easy
b. reaction to follow first order
c. reaction to proceed slowly
d. reaction to undergo a pseudo first order
Q. The conversion of trans-stilbene to cis-stilbene follows the molecularity:
a. bimolecular
b. termolecular
c. unimolecular
d. zeromolccular
Q. In the hydrolysis of sucrose in hydrochloric acid solution, the change in the optical rotation followsthe order:
a. pseudofirst
b. pseudo zero
c. second
d. zero
Q. In the degradation studies of aspirin suspension, the orders observed initially and at the end,respectively, are: -
a. first, second
b. first, zero
c. second, first
d. zero, first
Q. A prescription of liquid aspirin preparation contained 6.5 g/100 ml. The solubility of aspirin at 25°Cis 0.33 g/100 ml. The order of reaction in the kinetic study is:
a. apparent first
b. apparent zero
c. first
d. second
Q. The time required for the complete degradation of a drug in solution is a finite value. The order ofthat reaction is:
a. first
b. pseudo first
c. second
d. zero
Q. Normally, ethyl acetate undergoes hydrolysis in presence of H+and (OH)-ions. The order of the reaction observed in the acidic and alkaline solutions, respectively, are:
a. first and second
b. pseudo first and second
c. second and first
d. second and pseudo first
Q. In reactions that follow first order kinetics, half life is expressed by equation:
a. 0.693/k1
b. 0.301/k1
c. 0.105/k1
d. k1/0.693
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