Physical Pharmacy Quiz
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In the degradation studies of aspirin suspension the orders observed initially and at the end
A. First, second
B. First,zero
C. Second,first
D. Zero, first
In a second order reaction a=b. 20% of the reaction is completed in 500 seconds.calculate the time required for reaction to complete 60%.
A. 300 sec
B. 100sec
C. 4000sec
D. 50sec
The integral equation for a reaction K=X/at.x/(a-x) is concerned with the order.
A. First
B. Pseudo first
C. Second
D. Zero
The half life of a first order reaction is 4 years. What is shelf life.
A. 0.02
B. 0.03
C. 0.17
D. 0.61
In chemical kinetics the rate of reaction is expressed as (-dc/dt) where dc, refers to which concentration?
A. Catalyst
B. Product
C. Reactant
D. Solvent medium
The more reliable method to determine order of a reaction
A. Graphic method
B. Half life method
C. Substitution method
D. None
Which of the following dosage forms exhibit faster rate of reaction under normal conditions
A. Emulsions
B. Ointments
C. Solutions
D. Suspensions
The conversion of trans-stilbene to cis-stilbene follows the molecularity
A. Bimolecular
B. Termolecular
C. Unimolecular
D. Zero molecular
The time required for the concentration of the reactant to reduce to half of its initial concentration is known as
A. Order
B. Shelf Life
C. Molecularity
D. Half life
In the photochemical degradation of multisulphapreparation the order that a reaction does follow is
A. First
B. Pseudo first
C. Second
D. Zero
Following is the example of first order reaction.
A. Acid hydrolysis of ethylacetate
B. Oxidation of vitamin-A
C. Alkaline hydrolysis of ethylacetate
D. None
In a chemical reaction the rate constant is independent of the initial concentration.which of them is the order
A. First
B. Second
C. Third
D. Zero
A second order reaction follows pseudo first order reaction when the concentrations of
A. 2 reactants are high
B. 2 reactants are low
C. One reactant is far higher than other reactant
D. 2 reactants are equal
In reactions that follow 1st order kinetics,half life is expressed by equation.
A. 0.693/k1
B. 0.301/k1
C. 0.105/k1
D. K1/0.693
Which one of the following orders have abundant applications in biological processes?
A. First
B. Second
C. Third
D. Zero
