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WorksheetsMODULE 5 PHYPHARM PINK 101 - 200
Total questions: 100
Worksheet time: 50mins
Name
Class
Date
1.
Which of the following statement(s) is/are correct about colloidal dispersions<br /><br />I. The dispersed particle are having size intermediate to that of a true solution and coarse dispersion<br />II. May be considered as a two-phase system in certain conditions<br />III. May be considered as a one-phase system in certain conditions
a)
a. I only
b)
b. II only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
2.
This are properties which are dependent on the total contribution of each component in a system
a)
a. Additive
b)
b. Colligative
c)
c. Constitutive
d)
d. Extensive
3.
This are properties which are dependent on the arrangement and to a lesser extent on the number and kind of atoms within a molecule
a)
a. Additive
b)
b. Colligative
c)
c. Constitutive
d)
d. Extensive
4.
This is a property of a system which depends on the quantity of the matter present in a system
a)
a. Additive
b)
b. Intensive
c)
c. Constitutive
d)
d. Extensive
5.
This is/are example(s) of intensive properties<br /><br />I. Temperature<br />II. Volume<br />III. Density
a)
a. I only
b)
b. II only
c)
c. III only
d)
d. I and III
e)
e. I, II and III
6.
Which of the following is/are example of colligative properties of substances <br /><br />I. Osmotic Pressure Elevation<br />II. Vapor Pressure Lowering<br />III. Freezing Point Elevation
a)
a. I only
b)
b. II only
c)
c. III only
d)
d. I and II
e)
e. I, II and III
7.
Which of the following is/are example(s) of an additive property of a system<br /><br />I. Refractive Index<br />II. Solubility<br />III. Mass of a solution
a)
a. I only
b)
b. II only
c)
c. III only
d)
d. II and III
e)
e. I, II and III
8.
Which of the following is an example of an extensive property of a system
a)
a. Density
b)
b. Pressure
c)
c. Temperature
d)
d. Volume
9.
This concentration expression gives the measure of the relative proportion of moles of each constituent in a solution
a)
a. Molarity
b)
b. Molality
c)
c. Normality
d)
d. Mole Fraction
10.
Given a 0.2 M solution of NaCl (MW = 58.5) in water (MW = 18) with a specific gravity of 1.45<br /><br />How many grams of NaCl are present in 750ml solution
a)
a. 3.7 g
b)
b. 8.8 g
c)
c. 10.5 g
d)
d. 2.5 g
11.
Given a 0.2 M solution of NaCl (MW = 58.5) in water (MW = 18) with a specific gravity of 1.45<br /><br />What is the molality of the solution
a)
a. 0.2 m
b)
b. 1.5 m
c)
c. 0.14 m
d)
d. 0.5 m
12.
Given a 0.2 M solution of NaCl (MW = 58.5) in water (MW = 18) with a specific gravity of 1.45<br /><br />Determine the mole fraction of NaCl in solution
a)
a. 4.6 x 10-3
b)
b. 5.3 x 10-3
c)
c. 3.7 x 10-3
d)
d. 2.5 x 10-3
13.
The heat absorbed when a solid melts
a)
a. Heat of Fusion
b)
b. Heat of Vaporization
c)
c. Condensation
d)
d. Sublimation
14.
The human plasma contains 7.5 mEq/liter of calcium ions. How many milligrams of calcium chloride (MW = 147) are required to prepare a 750 ml solution having the same calcium plasma concentration?
a)
a. 826.8 mg
b)
b. 413.4 mg
c)
c. 206.7 mg
d)
d. 103.3 mg
15.
Calculate the number of milliequivalents/liter of Al2O3 (MW = 324) present in a 2.5% (w/v) solution of Al2O3
a)
a. 231 meq
b)
b. 463 meq
c)
c. 526 meq
d)
d. 173 meq
16.
Determine the vapor pressure of pure chloroform in a chloroform-water system, where water has a mole fraction of 0.25 and the vapor pressure of pure water at 75°C is 450 mmHg. The total vapor pressure of the mixture is 255 mmHg
a)
a. 190 mmHg
b)
b. 142.5 mmHg
c)
c. 210 mmHg
d)
d. 135 mmHg
17.
The vapor pressure of pure ethanol (MW = 72.5) at 25°C is 17.5 pounds/square inch (psi). Acetone (MW = 65.5) on the other hand has a vapor pressure of 20.25 psi. In preparing a kilo of a 1:1 solution of Ethanol and Acetone<br /><br />What is the partial pressure of ethanol in the mixture
a)
a. 10.63 psi
b)
b. 8.31 psi
c)
c. 18.94 psi
d)
d. 13.5 psi
18.
The vapor pressure of pure ethanol (MW = 72.5) at 25°C is 17.5 pounds/square inch (psi). Acetone (MW = 65.5) on the other hand has a vapor pressure of 20.25 psi. In preparing a kilo of a 1:1 solution of Ethanol and Acetone<br /><br />What is the partial pressure of acetone in the mixture
a)
a. 10.63 psi
b)
b. 8.31 psi
c)
c. 18.94 psi
d)
d. 13.5 psi
19.
The vapor pressure of pure ethanol (MW = 72.5) at 25°C is 17.5 pounds/square inch (psi). Acetone (MW = 65.5) on the other hand has a vapor pressure of 20.25 psi. In preparing a kilo of a 1:1 solution of Ethanol and Acetone<br /><br />What is the total vapor pressure of the mixture
a)
a. 10.63 psi
b)
b. 8.31 psi
c)
c. 18.94 psi
d)
d. 13.5 psi
20.
Using Van’t Hoff equation for osmotic pressure. What is the osmotic pressure of a solution prepared by dissolving 2.5g of urea (MW = 155) in 500 ml of water at 30°C
a)
a. 8 atm
b)
b. 0.8 atm
c)
c. 0.0008 atm
d)
d. 0.08 atm
21.
This is/are true statement(s) about a cathode<br /><br />I. This is the positively charged electrode<br />II. The electrode where reduction occurs<br />III. The electrode here positively charged ions are attracted to
a)
a. I only
b)
b. III only
c)
c. I and III
d)
d. II and III
e)
e. I, II and III
22.
This is/are true statement(s) about an anode<br /><br />I. This is the positively charged electrode<br />II. The electrode where oxidation occurs<br />III. The electrode where positively charged ions are attracted to
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
23.
These are solvents which are capable of accepting protons from the solute
a)
a. Protophilic
b)
b. Protogenic
c)
c. Amphiprotic
d)
d. Aprotic
24.
There are solvents which are capable of acting both as proton acceptor and proton donor
a)
a. Protophilic
b)
b. Protogenic
c)
c. Amphiprotic
d)
d. Aprotic
25.
These are solvents that neither accepts nor donate a proton
a)
a. Protophilic
b)
b. Protogenic
c)
c. Amphiprotic
d)
d. Aprotic
26.
A solvent characterized to be proton-donating compound
a)
a. Protophilic
b)
b. Protogenic
c)
c. Amphiprotic
d)
d. Aprotic
27.
A buffer solution was prepared by mixing 0.25M CHOONa and 0.125 HCOOH (pKa=3.75)<br /><br />Determine the pH of the buffer solution
a)
a. 3.95
b)
b. 4.25
c)
c. 4.05
d)
d. 3.99
28.
A buffer solution was prepared by mixing 0.25M CHOONa and 0.125 HCOOH (pKa=3.75)<br /><br />If the same composition is to be used in preparing a buffer solution with a pH of 4. What will be the molar ration of the salt to acid?
a)
a. 2.5:1
b)
b. 1:2.5
c)
c. 5.6:1
d)
d. 1:5.6
29.
A buffer solution was prepared by mixing 0.25M CHOONa and 0.125 HCOOH (pKa=3.75)<br /><br /> What is the percentage of the ionized species in the buffer system
a)
a. 84.8%
b)
b. 15.15%
c)
c. 45.2%
d)
d. 3.99%
30.
A buffer solution was prepared by mixing 0.25M CHOONa and 0.125 HCOOH (pKa=3.75)<br /><br />What is the percentage of the unionized species in the buffer system
a)
a. 84.8%
b)
b. 15.1%
c)
c. 45.2%
d)
d. 3.99%
31.
pH is defined as<br /><br /> I. Negative log of hydrogen ion concentration<br /> II. Sum of the hydrogen ion concentration and the hydroxyl ion concentration<br />III. Log of the hydrogen ion concentration
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
32.
Sodium bicarbonate has a molecular weight of 84. If the 210mg is dissolved in 1L, what would be the normality of the solution?
a)
a. 0.25 N
b)
b. 0.050 N
c)
c. 2.5 N
d)
d. 0.50 N
33.
The water-ion theory of acids and bases is attributed to
a)
a. Lewis
b)
b. Pearson
c)
c. Bronsted-Lowry
d)
d. Arrhenius
34.
What is the pH of a solution containing 0.5 mole of ephedrine and 0.02 mole of ephedrine HCl per liter of solution? The Kb of ephedrine is given as 3.16 x 10-6
a)
a. 8.35
b)
b. 9.90
c)
c. 10.89
d)
d. 11.20
35.
This is also known as the magnitude of the resistance of a buffer to resist pH changes<br /><br />I. Buffer capacity<br />II. Buffer efficiency<br />III. Buffer index
a)
a. I nly
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
36.
The Kb of pilocarpine is found to be 6.34 x 10-7 at 25°C<br /><br />Determine the mole ration (salt/base) present at pH of 8.5
a)
a. 5:1
b)
b. 1:5
c)
c. 8:1
d)
d. 1:8
37.
The Kb of pilocarpine is found to be 6.34 x 10-7 at 25°C<br /><br />Determine the mole percent of the base
a)
a. 83.3%
b)
b. 16.7%
c)
c. 20%
d)
d. 39.5%
38.
The Kb of pilocarpine is found to be 6.34 x 10-7 at 25°C<br /><br />Determine the mole percent of the salt
a)
a. 83.3%
b)
b. 16.7%
c)
c. 20%
d)
d. 39.5%
39.
A buffer was prepared containing 5 x 10-2 M sodium borate with 5 x 10-7 M boric acid. Determine the Ka of the acid if the solution have a pH of 1.0
a)
a. 1 x 106
b)
b. 1 x 10-6
c)
c. 1 x 10-9
d)
d. 1 x 10-10
40.
This is/are correct statement(s) about the effects of buffer capacity and pH in pharmaceutical products<br /><br />I. They influence tissue irritation<br />II. These two also affects the therapeutic response of a drug<br />III. These will also impart solubility to the drug product<br />
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
41.
This is/are methods of isotonicity adjusting involving the addition of tonicity adjusting agent such as NaCl to prepare the isotonic solution<br /><br />I. NaCL equivalent method<br />II. Cryoscopic or freezing point depression method<br />III. Sprowls method
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
42.
Calculate the osmolarity of a solution (mOsm/L) which contains 6 grams of sodium chloride in a liter (MW: Na = 23 ; Cl = 35.5)
a)
a. 51.3
b)
b. 205
c)
c. 102.5
d)
d. 307
43.
A solution contains 1% (w/v) Al2(SO4)3 ● 14 H2O (MW = 600). Assuming complete ionization and assuming the MW to be correct, what will be the calculated osmolarity of the solution?
a)
a. 20.8 mOsm/L
b)
b. 41.6 mOsm/L
c)
c. 83.3 mOsm/L
d)
d. 166.6 mOsm/L
e)
e. None of the above
44.
A compound A*B* is 25% ionized has a molecular weight of 275. Wat is the osmolarity of a 0.3% solution?
a)
a. 13.5 mOsm/L
b)
b. 11.6 mOsm/L
c)
c. 16.7 mOsm/L
d)
d. 10.5 mOsm/L
45.
Mannitol injection is used as a diuretic. The molecular weight of mannitol is 182. What is the osmolarity of a 0.2% solution? Mannitol is an ideal non-electrolyte
a)
a. 18 mOsm/L
b)
b. 20 mOsm/L
c)
c. 11 mOsm/L
d)
d. 4 mOsm/L
46.
The term which expresses osmotic pressure effect of a solution as osmols per kg of solvent is
a)
a. Osmolarity
b)
b. Osmolality
c)
c. Osmoticity
d)
d. Isotonicity
e)
e. Molarity
47.
The compound shown below is calcium biphosphate and has a MW of 234. What is its gram equivalent weight? Ca(H2PO4)2
a)
a. 29.3
b)
b. 58.5
c)
c. 117
d)
d. None of the above
48.
An IV solution contains 300mg of potassium chloride (MW: K = 39; Cl = 35.5) in a liter of a 5 percent dextrose solution (MW of dextrose is 200). What will be the osmolarity of the solution?
a)
a. 258 mOsm/L
b)
b. 8 mOsm/L
c)
c. 28 mOsm/L
d)
d. 254 mOsm/L
49.
Al2(SO4)3 has a MW of 342. What is its gram equivalent weight?
a)
a. 35 g/GEW
b)
b. 171 g/GEW
c)
c. 342 g/GEW
d)
d. 57 g/GEW
50.
Determine how much NaCl should be used to prepare the prescription
a)
a. 0.56 g
b)
b. 0.85 g
c)
c. 0.20 g
d)
d. 0.37 g
51.
Compute for the amount of dextrose (E=0.21) that would be necessary to make a gallon of a 5% solution of ephedrine sulfate (E=0.13) isotonic
a)
a. 9.5 g
b)
b. 25 g
c)
c. 45 g
d)
d. None of the above
52.
Rx<br /> ZnSO4 1%<br /> NaCl q.s<br /> Purified H2O q.s 60ml<br /><br /> How much NaCl is needed to make an isotonic solution? (E value for ZnSO4 = 0.15)
a)
a. 0.45 g
b)
b. 0.54 g
c)
c. 0.60 g
d)
d. 0.75 g
53.
Rx<br /> Ingredient X 0.5 (Ingredient X)<br /> NaCl q.s MW 300<br /> Purified H2O ad 60 ml i Factor 1.4<br /><br />If boric acid is to be used to adjust the tonicity of the solution, how much of this should be used (E value of boric acid = 0.20)
a)
a. 0.45 g
b)
b. 1.54 g
c)
c. 2.25 g
d)
d. 0.75 g
54.
Rx<br /> Ingredient X 0.5 (Ingredient X)<br /> NaCl q.s MW 300<br /> Purified H2O ad 60 ml i Factor 1.4<br /><br />Determine the E value of ingredient X<br />
a)
a. 0.45
b)
b. 0.15
c)
c. 0.25
d)
d. 0.75
55.
Rx<br /> Ingredient X 0.5 (Ingredient X)<br /> NaCl q.s MW 300<br /> Purified H2O ad 60 ml i Factor 1.4<br /><br />Determine how many grams of NaCl should be required in compounding the following prescription<br />
a)
a. 0.375 g
b)
b. 0.425 g
c)
c. 1.25 g
d)
d. 0.75 g
56.
What if apomorphine HCl (E = 0.12) is used in making the solution isotonic rather than NaCl, how much of apomorphine should be used?
a)
a. 5.37 g
b)
b. 3.12 g
c)
c. 4.25 g
d)
d. 2.75 g
57.
Using the White-Vincent method for adjusting isotonicity, compute for the amount of diluting isotonic solution needed to bring a 75 ml of 5% KCl solution (E = 0.21) to the desired volume
a)
a. 52.5 ml
b)
b. 32.3 ml
c)
c. 97.5 ml
d)
d. 27.5 g
58.
This is/are factors that affects the solubility of gas in liquids<br /><br />I. Pressure<br />II. Presence of salts<br />III. Chemical reactions between the gas and the solvent<br />
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
59.
This is a type of system in which the solute is in equilibrium with the solid phase
a)
a. Saturated
b)
b. Unsaturated
c)
c. Subsaturated
d)
d. Supersaturated
60.
If a substance dissolves in a hundred to a thousand parts of solvent such substance is characterized to be
a)
a. Soluble
b)
b. Sparingly soluble
c)
c. Slightly soluble
d)
d. Very slightly soluble
61.
Defined as the spontaneous interaction of two or more substances to form a homogenous molecular dispersion
a)
a. Distribution
b)
b. Solubility
c)
c. Diffusion
d)
d. Stability
62.
The law that states in a very dilute solution at constant temperature, the concentration of dissolved gas is proportional to the partial pressure of the gas above the solution in equilibrium
a)
a. Raoult’s Law
b)
b. Henry’s Law
c)
c. Dalton’s Law
d)
d. Graham’s Law
63.
Salting out is a process that may take place in<br /><br />I. Gas in Liquid System<br />II. Liquid in Liquid System<br />III. Solid in Liquid System
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
64.
In the determination of molecular weight, the freezing point method is the preferred method when<br /><br />I. The solute is alcohol<br />II. The solute is nonvolatile<br />III. The substance is not decomposed at boiling temperature
a)
a. I only
b)
b. II only
c)
c. III only
d)
d. I and II
e)
e. I and III
65.
The addition of electrons to a chemical species is called
a)
a. Reduction
b)
b. Oxidation
c)
c. Electrolysis
d)
d. Conduction
66.
The man who stated that the passage of 96,500 coulombs of electricity through a conductivity cell produces a chemical change of 1 gram equivalent weight of any substance
a)
a. Van’t Hoff
b)
b. Arrhenius
c)
c. Debye
d)
d. Faraday
67.
The scientist who developed the principle that strong electrolytes are completely dissociated into ions in solutions of moderate concentration and that any deviation from complete dissociation is due to interionic attractions
a)
a. Mason and Gardner
b)
b. Van’t Hoff and Morse
c)
c. Debye and Huckel
d)
d. Bronsted and Lowry
68.
Which of the following is an example of protogenic solvent
a)
a. Formic acid
b)
b. Acetone
c)
c. Ether
d)
d. Liquid Ammonia
69.
A substance containing two or more donor groups may combine with a metal to form a special type of complex known as
a)
a. Colloid
b)
b. Chelate
c)
c. Ligands
d)
d. Clathrates
70.
Which of the following is the correct unit of expression for a zero-order rate constant
a)
a. Time-1
b)
b. Concentration-1 time-1
c)
c. Concentration / time
d)
d. Concentration / time-1
71.
Which of the following is the correct unit of expression for a first-order rate constant
a)
a. Time-1
b)
b. Concentration-1 time-1
c)
c. Concentration / time
d)
d. Concentration / time-1
72.
Which of the following is the correct unit of expression for a second-order rate constant
a)
a. Time-1
b)
b. Concentration-1 time-1
c)
c. Concentration / time
d)
d. Concentration / time-1
73.
This is the equation for determining the half-life of a first-order reaction. Where a = concentration
a)
a. a / 2k
b)
b. 1 / ak
c)
c. 0.693 / k
d)
d. 3 / 2 a2k
74.
Which of the following is the half-life equation for the second-order kinetics
a)
a. a / 2k
b)
b. 1 / ak
c)
c. 0.693 / k
d)
d. 3 / 2 a2k
75.
Which of the following is the half-life equation for the zero-order kinetics
a)
a. a / 2k
b)
b. 1 / ak
c)
c. 0.693 / k
d)
d. 3 / 2 a2k
76.
The concentration of formaldehyde remaining after 180 min., expressed as the volume of the gas, was 5 ml from an initial volume of 60 ml<br /><br />Compute for the first-order rate constant
a)
a. 0.0035 / min
b)
b. 0.0138 / min
c)
c. 0.693 / min
d)
d. 0.012 / min
77.
The concentration of formaldehyde remaining after 180 min., expressed as the volume of the gas, was 5 ml from an initial volume of 60 ml <br /><br />Compute for the half-life of formaldehyde
a)
a. 45.2 min
b)
b. 80.4 min
c)
c. 50.2 min
d)
d. 28.7 min
78.
The concentration of formaldehyde remaining after 180 min., expressed as the volume of the gas, was 5 ml from an initial volume of 60 ml <br /><br /> How much of formaldehyde have decomposed after 30 min?
a)
a. 20.33 ml
b)
b. 30.25 ml
c)
c. 39.67 ml
d)
d. 28.75 ml
79.
The concentration of formaldehyde remaining after 180 min., expressed as the volume of the gas, was 5 ml from an initial volume of 60 ml <br /><br />What is the shelf-life of formaldehyde
a)
a. 4.2 min
b)
b. 8.4 min
c)
c. 5.2 min
d)
d. 7.6 min
80.
A suspension is to contain 3.5g per two tablespoon full of a drug. The solubility of the drug is 250mg/100ml. The 1st order rate constant for the drug degradation was given as 3.5 x 10-4 per hour<br /><br />Compute for the zero-order rate constant
a)
<br />a. 8.75 x 10-5 g/100 mL or 8.75 x 10-5 g/100ml.hr-<br /> hr
b)
b. 7.35 x 10-5 g/100 mL or 7.35 x 10-5 g/100ml.hr-<br /> hr
c)
c. 5.48 x 10-5 g/100 mL or 5.48 x 10-5 g/100ml.hr-<br /> hr
d)
d. 6.75 x 10-5 g/100 mL or 6.75 x 10-5 g/100ml.hr-<br /> hr
81.
A suspension is to contain 3.5g per two tablespoon full of a drug. The solubility of the drug is 250mg/100ml. The 1st order rate constant for the drug degradation was given as 3.5 x 10-4 per hour<br /><br />Determine the shelf-life of the product
a)
a. 3 years
b)
b. 2.5 years
c)
c. 2 years
d)
d. 1.5 years
82.
A suspension is to contain 3.5g per two tablespoon full of a drug. The solubility of the drug is 250mg/100ml. The 1st order rate constant for the drug degradation was given as 3.5 x 10-4 per hour<br /><br /><br />Determine its half-life
a)
a. 3.7 years
b)
b. 5.5 years
c)
c. 7.7 years
d)
d. 2.6 years
83.
A suspension is to contain 3.5g per two tablespoon full of a drug. The solubility of the drug is 250mg/100ml. The 1st order rate constant for the drug degradation was given as 3.5 x 10-4 per hour<br /><br />A type of reaction-order where the amount of drug A is decreasing at a rate proportional to the square of the amount of drug A remaining
a)
a. 1st order
b)
b. 2nd order
c)
c. 3rd order
d)
d. 0th order
84.
A suspension is to contain 3.5g per two tablespoon full of a drug. The solubility of the drug is 250mg/100ml. The 1st order rate constant for the drug degradation was given as 3.5 x 10-4 per hour<br /><br />A type of reaction-order where the rate is independent of the concentration of the reactant/s
a)
a. 1st order
b)
b. 2nd order
c)
c. 3rd order
d)
d. 0th order
85.
A type of reaction where the rate of reaction is dependent of the concentration of the drug remaining
a)
a. 1st order
b)
b. 2nd order
c)
c. 3rd order
d)
d. 0th order
86.
A separation process based on unequal rates of passage of solutes and solvent through a microporous membranes, carried out in a batch in a continuous mode
a)
a. Diffusion
b)
b. Dialysis
c)
c. Osmosis
d)
d. Ultrafiltration
87.
It is used to separate colloidal particles and macromolecules by the use of a membrane
a)
a. Diffusion
b)
b. Dialysis
c)
c. Osmosis
d)
d. Ultrafiltration
88.
This is a process of mass transfer of individual molecules of a substance, brought about by random molecular motion and associated with a concentration gradient
a)
a. Diffusion
b)
b. Dialysis
c)
c. Osmosis
d)
d. Ultrafiltration
89.
This is referred to as the transfer of solvent molecules through a semipermeable membrane from a region of low solute to high solute concentration
a)
a. Diffusion
b)
b. Dialysis
c)
c. Osmosis
d)
d. Ultrafiltration
90.
This is a process almost similar to ultrafiltration, which differs only in that it requires higher pressure
a)
a. Diffusion
b)
b. Reverse osmosis
c)
c. Hemodialysis
d)
d. Microfiltration
91.
This law explains the phenomenon of diffusion
a)
a. Newton’s Law
b)
b. Henry’s Law
c)
c. Dalton’s Law
d)
d. Fick’s Law
92.
This equation refers to the dissolution rate of drugs in solution
a)
a. Fick’s equation
b)
b. Noyes-Whitney equation
c)
c. Michaelis-Menten equation
d)
d. Henderson-Hasselbalch equation
93.
This is/are example(s) of systems where in a liquid interface is present<br /><br />I. Gas in Liquid System<br />II. Liquid in Liquid System<br />III. Solid in Liquid System
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
94.
The force of attraction between molecules of different phases is referred to as
a)
a. Electrostatic force
b)
b. Adhesive force
c)
c. Van der Waal’s force
d)
d. Cohesive
95.
This is/are the force per unit length existing at the interface between two immiscible liquid phases<br /><br /> I. Interfacial tension<br /> II. Surface tension
a)
a. I only
b)
b. II only
c)
c. I and II
96.
This is/are true statement(s) about surface and interfacial tensions <br /><br />I. Surface tension is reserved only for liquid-gas and solid-gas systems<br />II. Generally surface tension is stronger than interfacial tension<br />III. Interfacial tension includes the force acting in between a solid-solid system
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
97.
This is/are method used for measuring surface and interfacial tension<br /><br />I. Capillary rise method<br />II. DuNouy ring method<br />III. Drop weight method
a)
a. I only
b)
b. III only
c)
c. I and II
d)
d. II and III
e)
e. I, II and III
98.
Proposed the monolayer theory of gas adsorption on solid surface
a)
a. Langmuir
b)
b. Freundlich
c)
c. Noyes-Whitney
d)
d. Brunauer, Emmet and Teller
99.
This is a surfactant that wen dissolved in water lowers the advancing contact angle and aids in displacing an air phase at the surface and replacing it with a liquid phase
a)
a. Detergent
b)
b. Wetting agent
c)
c. Solubilizing agent
d)
d. Antifoaming agent
100.
This is characterized as a stable structure consisting of air pockets enclosed within thin film of liquid
a)
a. Aerosol
b)
b. Foam
c)
c. Detergent
d)
d. Antifoaming agent
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