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Worksheetsphysical pharmacy
Total questions: 35
Worksheet time: 18mins
The surface tension of water is ...................
70 dyne/cm
72.8 dyne/cm
82.4 dyne/ cm
69.8 dyne/cm
The viscosity of water is ............
1 cp
72.8 cp
25 cp
66.8 cp
The critical solution temperature of phenol and water is ............
50 °C
66.8°C
72.8 °C
65 °C
The slope of this line =
viscosity
fluidity
shear stress
rate of shear
The slope =
Fluidity
1/ η
φ
all of the above
This rule is used for determination of .....................
= 72.8 x N av. water
N av. unknown
surface tension
viscosity
adsorption
CST
The number of drops is ................. proportional to surface tension
directly
inversely
The time is ..................... proportional to viscosity
directly
inversely
The .....................is the process of holding molecules (adsorbate) at the surface of solid (adsorbent).
Adsorption
surface tension
desorption
absorption
The Adsorbate may be gas or solid or liquid
True
False
The .....................is the removal of the adsorbate from the adsorbent surface.
Adsorption
surface tension
desorption
absorption
on plotting the straight line of Freundlich equation the y-intercept =
Log K
Log x/m
Log C
1/n
It is a graph of temperature versus composition at constant pressure, It describes the effect of temperature on the miscibility of the two phases.
Rheogram
Phase diagram
Chromatogram
flow chart
The maximum temperature at which the two phases region exists is termed
Transition temperature
Miscibility temperature
Turbidity temperature
Critical solution temperature
All combinations of phenol and water above 66.8 oC are completely miscible and yield one phase liquid systems
True
False
For determination of Solution temperature of certain concentration of phenol and water ..................
The ampule is heated gradually in water bath and Temp of 1 phase recorded
The ampule is left to cool and temp. of phase separation is recorded
The ampule is shaken vigorously till equilibrium
The line drawn across the region containing two phases parallel to the base line in two-component systems is termed ..............................
straight line
Tie line
Phase line
extrapolated line
The concentration of surfactant at which the micelles are formed ...........
CMC
CVC
CST
CLV
For determination of turbidity temperature of certain concentration of phenol and water ..................
The ampule is heated gradually in water bath and Temp of 1 phase recorded
The ampule is left to cool and temp. of phase separation is recorded
The ampule is shaken vigorously till equilibrium
.................... can be defined as the shearing force required to produce a velocity of 1 cm/sec between two parallel planes of liquid each of 1 cm2 in area and separated by a distance of 1 cm
viscosity
Poise
Newtonian low
Shearing stress
According to .......................... the higher the viscosity of a liquid is, the greater the force per unit area (shearing stress F) required to produce a certain rate of shear (G)
Freundlich equation
Poisellieus law
Newtonian law
lanqmire equation
Which of the following is considered non-newtoninan flow ?
Plastic flow
Pseudoplastic flow
Dilatant flow
all of the above
................... is a measure of the resistance of a fluid to flow.
Shear stress
Viscosity
shear rate
velocity gradient
Surfactant with HLB range from 7-9 could be used as ..........
O/W emulsifier
w/o Emulsifier
Wetting & spreading agent
Solubilizing agents
The higher the HLB value of a surfactant, the more hydrophilic it is.
True
False
The lower the HLB value of a surfactant, the more lipophilic it is.
True
False
........................ can be defined as the relative efficiency of the hydrophilic portion of the surfactant molecule to its lipophilic portion of the same molecule
CMC
CST
HLB
Pka
...................... is an arbitrary scale of values to serve as a measure of the Hydrophilic Lipophilic Balance (HLB)
HB scale
Griffins scale
Poisellieus law
The surface tension decreases up till the ..................., then above the surface tension remains constant
CVC
CMC
CBC
MBC
Which of the following could be used for determination of CMC ?
Solubilization method
Surface tension method
Both methods
The unit of Surface Free Energy
erg/cm2
Centipoise
dyne/cm
liter.mole
The unit of Surface tension
erg/cm2
Centipoise
dyne/cm
liter.mole
In ............................the reaction rate is Directly proportional (Dependent) on the remaining concentration of single reactant.
Zero order
First Order
second order
In ......................... the reaction rate is independent on concentration of reactants (i.e.The reaction has Constant Rate)
Zero Order
First order
second order
The unit of first order reaction rate constant is
Time -1
conc./time
time
mg.time/L
