Correct Answer:- Option-B
Question74:-Pick out the correct statement
A:-Colloidal particles can pass through a semipermeable membrane
B:-Colloidal particles can pass through a filter paper
C:-Colloidal particles are invisible in electron microscope

D:-As the particles in gold sol increase in size, its colour changes from blue to
red

Correct Answer:- Option-B
Question75:-Which among the following has the highest HLB value ?
A:-Oleic acid
B:-Span 80
C:-Sodium lauryl sulphate
D:-Gelatin
Correct Answer:- Option-C

Question76:-Which among the following can be used for the determination of
viscosity of a Newtonian liquid ?

A:-Capillary viscometer
B:-Cone and plate viscometer
C:-Cup and Bob viscometer
D:-All the above

Correct Answer:- Option-D

Question77:-The shelf life of a drug (assuming duration of retaining at least 90% of
initial strength as shelf life) undergoing first order decomposition can be calculated
using the formula

A:-0.693 divided by rate constant for decomposition
B:-0.104 divided by rate constant for decomposition
C:-Half of initial concentration divided by rate constant for decomposition

D:-10 percentage of initial concentration divided by rate constant for
decomposition

Correct Answer:- Option-B

Question78:-In a Fisher sub sieve sizer,
A:-Surface area of a powder is determined by adsorption method
B:-Particle volume is measured by conductivity method
C:-Surface area of a powder is determined by air permeability method
D:-Particle size determined by hydrometer sedimentation method
Correct Answer:- Option-C

Question79:-Who among the following is not an ex officio member of the Drugs
Technical Advisory Board ?