MCQ No. 1952 | Physical Pharmaceutics
Downward creaming means ........ rate of sedimentation
Downward creaming means ........ rate of sedimentation
Anonymous Quiz
44%
Negative
45%
Positive
8%
Same
4%
No charge
MCQ No. 1953 | Physical pharmaceutics
Ideal Phase volume ratio for stable emulsions is
Ideal Phase volume ratio for stable emulsions is
Anonymous Quiz
22%
25:75
49%
50:50
24%
75:25
6%
33:66
MCQ No. 1954 | Physical pharmaceutics
According to Stokes law, the creaming of emulsions is indirectly proportional to:
According to Stokes law, the creaming of emulsions is indirectly proportional to:
Anonymous Quiz
23%
Density of the dispersed phase
37%
Particle size of the globules
12%
Gravity
28%
Viscosity of the medium
MCQ No. 1955 | Physical pharmaceutics
When oil and water are triturated together, the interfacial free energy was observed to be increased. What does it indicate?
When oil and water are triturated together, the interfacial free energy was observed to be increased. What does it indicate?
Anonymous Quiz
36%
Decrease in the interfacial tension
36%
Decrease in the stability
18%
Increase in stability
11%
Stable film formation
MCQ No. 1956 | Physical pharmaceutics
The HLB range of an emulsifier employed in the preparation of water-in-oil emulsion is:
The HLB range of an emulsifier employed in the preparation of water-in-oil emulsion is:
Anonymous Quiz
42%
3 to 6
32%
7 to 12
20%
13 to 15
7%
More than 15
MCQ No. 1957 | Physical pharmaceutics
Microemulsions contain globules of the size about .........
Microemulsions contain globules of the size about .........
Anonymous Quiz
3%
0 µm
19%
1 µm
59%
0.1 µm
18%
0.01 µm
MCQ No. 1958 | Physical pharmaceutics
The phase inversion occur due to
The phase inversion occur due to
Anonymous Quiz
9%
Changes in type of emulsifying agent
16%
Change in phase volume ratio
72%
Both a & b
3%
None of the above
MCQ No. 1959 | Physical pharmaceutics
Which of the following is identification test for emulsion
Which of the following is identification test for emulsion
Anonymous Quiz
7%
Dilution test
6%
Cobalt chloride test
8%
Conductivity test
80%
All of the above
MCQ No. 1960 | Physical pharmaceutics
Emulsion is
Emulsion is
Anonymous Quiz
3%
Stable preparation
17%
Thermodynamically unstable preparation
20%
Biphasic system
60%
B & C
MCQ No. 1961 | Physical pharmaceutics
Emulsion containing more than two phases are called as
Emulsion containing more than two phases are called as
Anonymous Quiz
16%
Mixed emulsion
62%
Multiple emulsion
18%
Complex emulsion
5%
None of the above
MCQ No. 1962 | Physical pharmaceutics
Emulsions are defined as thermodynamically unstable systems. The events that follow sequentially towards instability are:
Emulsions are defined as thermodynamically unstable systems. The events that follow sequentially towards instability are:
Anonymous Quiz
22%
coalescence, breaking, creaming and flocculation
37%
coalescence, flocculation, creaming and breaking
23%
flocculation, creaming, breaking and coalescence
19%
flocculation, creaming, coalescence and breaking
MCQ No. 1963 | Physical pharmaceutics
In the stability of emulsion, which important instability step should be prevented?
In the stability of emulsion, which important instability step should be prevented?
Anonymous Quiz
20%
Breaking
36%
Coalescence
27%
Flocculation
16%
Creaming
MCQ No. 1964 | Physical pharmaceutics
An emulsifier is considered to be ideal, if it is soluble in
An emulsifier is considered to be ideal, if it is soluble in
Anonymous Quiz
10%
Aqueous phase
14%
Oil phase
74%
Both a & b
2%
None
MCQ No. 1965 | Physical pharmaceutics
Emulsions made with tweens are
Emulsions made with tweens are
Anonymous Quiz
24%
W/O
52%
O/W
15%
Clear
10%
Unstable
MCQ No. 1966 | Medichem
Which of the following is not a non selective Alpha adrenergic antagonist?
Which of the following is not a non selective Alpha adrenergic antagonist?
Anonymous Quiz
27%
Phenoxybenzamine
20%
Tolazoline
18%
Phentolamine
35%
Yohimbine
MCQ No. 1967 | PP
Fluidity is
Fluidity is
Anonymous Quiz
13%
reciprocal of density
23%
reciprocal of surface tension
9%
reciprocal of volume
56%
reciprocal of viscosity
MCQ No. 1968 | PP
Dilatant flow are also known as-
Dilatant flow are also known as-
Anonymous Quiz
28%
Shear thinning system
52%
Shear thickening system
11%
Elastic deformation
9%
Plastic deformation
MCQ No. 1969 | PP
The restoring force depends on _____
The restoring force depends on _____
Anonymous Quiz
55%
Interatomic bond strength
13%
Melting point
15%
Crystallization
16%
Thermal conductivity
MCQ No. 1970 | POC
Which contains oxygen and nitrogen as hetero atom ?
Which contains oxygen and nitrogen as hetero atom ?
Anonymous Quiz
17%
Pyrazole
33%
Imidazole
43%
Oxazole
7%
Thiazole
• Agonist
An agonist is a compound that binds to a receptor and produces the biological response.
• Efficacy
Efficacy is the maximal response a drug can produce. Potency is a measure of the dose that is required to produce a response.
• Potency
Potency is often expressed as the dose of a drug required to achieve 50% of the desired therapeutic effect. This is the ED50 (effective dose).
An agonist is a compound that binds to a receptor and produces the biological response.
• Efficacy
Efficacy is the maximal response a drug can produce. Potency is a measure of the dose that is required to produce a response.
• Potency
Potency is often expressed as the dose of a drug required to achieve 50% of the desired therapeutic effect. This is the ED50 (effective dose).