PHA 317: Pharmaceutics Quiz 5 – 9 UPDATED ACTUAL Questions and CORRECT
Answers
Viscosity of an unknown liquid is 0.480 cp 0.559 centistokes
at 25°C and the density is
0.858 g/cm3. What is the kinematic viscosity
of that unknown liquid?
A plastic material has a yield value of 4000 20 poise
dynes cm-2 . At shearing stress (F) above
the yield value, F, was found to increase
linearly with rate of shear, G. If the rate of
shear, G, was 100 sec-1 when F was 6000
dynes cm-2. Calculate the plastic viscosity?
Viscosity of acetone is 0.280 cp at 25°C 0.355 centistokes
and the density is 0.788g/cm3. What is the
kinematic viscosity of acetone?
The kinematic viscosity of acetone is 0.397 3.196 cps^-1
centistokes and the density of acetone at
25°C is 0.788g/cm3. Calculate the fluidity of
acetone.
A plastic material has a yield value of 2500 31.2 poise
dynes cm-2. At shearing stress (F) above
the yield value, P, was found to increase
linearly with rate of shear, Vg. If the rate of
shear, Vg, was 160 sec-1 when F was 7500
dynes cm-2. Calculate the plastic viscosity?
Which of the following flow patterns Dilatant
exhibited by a drug-dosage form is
extremely unacceptable?
Thixotropy is a special characteristic that is i. Dilatant
exhibited by shear thinning systems, such ii. Plastic
as: iii. Pseudoplastic
, i. Thixotropy is exhibited by shear thinning systems, such as pseudoplastic and plastic
liquids.
Which of the following facts is/are correct ii. Thixotropy can be defined as, "an isothermal and comparatively slow recovery, on
with respect to thixotropy: standing of a material, of a consistency lost through shearing".
iii. Thixotropic behavior is useful for many pharmaceutical preparations e.g.,
suspensions.
1 centipoise is equal to: 0.01 poise
The Arrhenius equation of rheology viscosity and temperature
expresses the relationship between:
Blood plasma normally shows viscosity True
only, while whole blood is both viscous
and elastic. (True or False)
Ostwald viscometer: Used for liquids that flow relatively easily
One gram of sucrose, molecular weight 0.71 atm
342 g/mole, is dissolved in 100 mL of
solution at 25°C. What is the osmotic
pressure of the solution? Given that R =
0.082 liter atm/mol deg.
How much NaCl is required to render 20 0.145 g
mL of a solution containing 0.25 g of
apomorphine hydrochloride isotonic with
blood serum? (Freezing point depression
of 1% apomorphine is 0.08 degree).
Isotonic sodium chloride solution contains 5.0%
0.9% w/v sodium chloride. If the E value of
anhydrous dextrose is 0.18, calculate the
percentage strength (w/v) of an isotonic
solution of anhydrous dextrose.
Procaine HCl ............... 0.25 g 0.218 g
Sodium Chloride ........... q.s.
Sterile Water for injection .. ad 30 mL
Make isoton. sol.
Sig. For injection.
How many grams of sodium chloride
should be used in compounding the above
prescription? (The E value of Procaine HCl
is 0.21).
The v value of calcium lactate is equal to 3.9%
7.7. What is the percentage concentration
of its isotonic solution?
Using starch in oral rehydration mixture to True
replenish fluid during diarrhea is a better
choice than increasing glucose
concentration.
The shifting of peak of maximum Hypsochromic or blue shift
absorption towards shorter wavelength in a
spectrum is called:
Answers
Viscosity of an unknown liquid is 0.480 cp 0.559 centistokes
at 25°C and the density is
0.858 g/cm3. What is the kinematic viscosity
of that unknown liquid?
A plastic material has a yield value of 4000 20 poise
dynes cm-2 . At shearing stress (F) above
the yield value, F, was found to increase
linearly with rate of shear, G. If the rate of
shear, G, was 100 sec-1 when F was 6000
dynes cm-2. Calculate the plastic viscosity?
Viscosity of acetone is 0.280 cp at 25°C 0.355 centistokes
and the density is 0.788g/cm3. What is the
kinematic viscosity of acetone?
The kinematic viscosity of acetone is 0.397 3.196 cps^-1
centistokes and the density of acetone at
25°C is 0.788g/cm3. Calculate the fluidity of
acetone.
A plastic material has a yield value of 2500 31.2 poise
dynes cm-2. At shearing stress (F) above
the yield value, P, was found to increase
linearly with rate of shear, Vg. If the rate of
shear, Vg, was 160 sec-1 when F was 7500
dynes cm-2. Calculate the plastic viscosity?
Which of the following flow patterns Dilatant
exhibited by a drug-dosage form is
extremely unacceptable?
Thixotropy is a special characteristic that is i. Dilatant
exhibited by shear thinning systems, such ii. Plastic
as: iii. Pseudoplastic
, i. Thixotropy is exhibited by shear thinning systems, such as pseudoplastic and plastic
liquids.
Which of the following facts is/are correct ii. Thixotropy can be defined as, "an isothermal and comparatively slow recovery, on
with respect to thixotropy: standing of a material, of a consistency lost through shearing".
iii. Thixotropic behavior is useful for many pharmaceutical preparations e.g.,
suspensions.
1 centipoise is equal to: 0.01 poise
The Arrhenius equation of rheology viscosity and temperature
expresses the relationship between:
Blood plasma normally shows viscosity True
only, while whole blood is both viscous
and elastic. (True or False)
Ostwald viscometer: Used for liquids that flow relatively easily
One gram of sucrose, molecular weight 0.71 atm
342 g/mole, is dissolved in 100 mL of
solution at 25°C. What is the osmotic
pressure of the solution? Given that R =
0.082 liter atm/mol deg.
How much NaCl is required to render 20 0.145 g
mL of a solution containing 0.25 g of
apomorphine hydrochloride isotonic with
blood serum? (Freezing point depression
of 1% apomorphine is 0.08 degree).
Isotonic sodium chloride solution contains 5.0%
0.9% w/v sodium chloride. If the E value of
anhydrous dextrose is 0.18, calculate the
percentage strength (w/v) of an isotonic
solution of anhydrous dextrose.
Procaine HCl ............... 0.25 g 0.218 g
Sodium Chloride ........... q.s.
Sterile Water for injection .. ad 30 mL
Make isoton. sol.
Sig. For injection.
How many grams of sodium chloride
should be used in compounding the above
prescription? (The E value of Procaine HCl
is 0.21).
The v value of calcium lactate is equal to 3.9%
7.7. What is the percentage concentration
of its isotonic solution?
Using starch in oral rehydration mixture to True
replenish fluid during diarrhea is a better
choice than increasing glucose
concentration.
The shifting of peak of maximum Hypsochromic or blue shift
absorption towards shorter wavelength in a
spectrum is called:
