pharmaceutics exam 1
Find the values of x in 2^-5 x 2^2= 2^x
-3
Find the values of x in (2^-4)^2=2^x
-8
Find the values of x in 3^-5/ 3^3=3^x
-8
Solve and identify the correct answer for the numerical example below 1000 x 0
0
What is the specific gravity of a substance of density 10 Kg/m^3? Given that the density of water is 1 g/cc (cc=cubic centimeter)
0.01
What is the density of a substance having mass 20 g and volume 16 cc (cc=cubic centimeter)
1.25 g/cc
Calculate the density of a substance which has a mass and volume of 25g and 20 mL
1.25 g/ml
What is the density of mercury (13.6 g/cm^3) in units of kg/m^3?
1.36 x 10^4 kg/m^3
Density of a substance having volume 20 cm^3 and mass 0.03 kg=___gm/cc (cc=cubic centimeter)
1.5
There are how many microgram (ug) in 10 milligram (mg)?
10,000
An angstrom unit A is equal to
10^-10
1 millimeter is =
10^3 meter
A sample of calcium nitrate, Ca(No3)2, with a formula weight of 164 g/mol, has 4.00 x 10^26 atoms of oxygen. How many kilograms of Ca(NO3)2 are present?
18.155 kg
A sample of calcium nitrate, Ca(NO3)2, with a formula weight of 164g//mol, has 4.00x10^27 atoms of oxygen. How many kilograms of Ca(NO3)2 are present
181.526 kg
Find the values of x in 2^5 x 2^-3= 2x
2
What is the value of slope in the equation of straight line represented by y=2x+5
2
give the correct number of significant figures for 4500,4567,0.0032,0.04050
2,4,2,4
Compute the vapor pressure of water at 125*C. The vapor pressure of water at 100*C is 1 atmosphere, and the deltaH is 9,720 calories/mole
2.279
how many microgram in 2.5 milligram
2.5 x 10^3
What is the mass of a material having a density 1.25 g/cc and a volume of 16 cc?
20g
298.16 degree Kelvin (K) is equal to
25*C
Five individual weights of compounded amoxycilline capsules are 250 mg, 260 mg, 254 mg, 248 mg, and 264 mg. Average weight of capsules is
255.2 mg
300 absolute temperature is equal to how much degree Celsius (*C)
26.84
Find the correct value for log 4/25
2log 2/5 and log 4-log25
3^9/ (3^6 x 3^2)=
3
The correct answer of this numerical example 3^9/3^6 x 3^2
3
in the equation y=3x + 6 representing a straight line, what is the value of the slope?
3
the content of an aerosol are at a pressure of 2 atmosopheres at 25*C. What happens to the pressure when the aerosol is stored at 200*C? Given, the volume of the aerosol cintainer is 0.05 liters
3.2 atm
the total pressure of an aerosol container at 25*C is 2 atm. What will be the pressure of this container at a temperature of 200*C?
3.2 or 3.17
Divide 35.9 by 9.7865 and give the answer to the correct number of sig figs
3.67
Convert 104* Fahrenheit to degree Celsius
40* Centigrade
10 calories =
42 x 10^7 ergs
Find the values of x in 5^3 x 5^2= 5^x
5
Express 5 joules in terms of ergs and calories
5 X 10^7 ergs; 1.2 calories
Blood is maintained at a pH of
7.4
Solve and identify the correct answer for the numerical example below 7^7 x 7^5 x 7^2
7^14
The correct answers of 7^7 x 7^5 x 7^2, (9^4)^2, 1000x0, 1000 x infinity, and 1000/infinity are
7^14, 9^8,0,infinity, undefined
Multiply 4.5678 by 1.8 and give the answer to the correct number of sig figs
8.2
What is the fifth root of 8.96 x 10^34
9.783 x 10^6
Solve and identify the correct answer for the numerical example below (9^4)^2
9^8
Thermodynamics defines quantitative relationships between i. heat and mechanical energy ii. heat and electrical energy iii. heat and chemical energy
All are correct
The process of crystallization comprises of nucleation and crystal growth which are influenced by solvent, temp, impurities, etc. Please select the factors responsible for a specific shape of crystal i solvent ii temperature iii concentration and types of impurities
All i,ii,iii are correct
The values of abscissa are positive in
I and IV quadrant
The critical temperature and pressure for CO2 gas are 31*C and 74.9 atm, reapectively. Can you liquefy CO2 stored at 100*C by applying pressure only?
NO
is it possible to boil water at a temper greater than 100 degree Celsius? A. No, you cannot increase the boiling point of water beyond 100 degree Celsius at any condition B. Yes, if pressure over the water is greater than atmospheric pressure C. Yes, if pressure over the water is lower than atmospheric pressure
Only B is correct
If a gas is existing at a temperature greater than its critical temperature, can you liquefy it by increasing pressure over it? A. Yes by applying pressure greater than its critical pressure B. Yes, by applying pressure lower than its critical pressure C. No, it cannot be liquefied no matter how much pressure you apply
Only C is correct
i. Ordinate is the value of coordinate on the y-axis in a Cartesian coordinate system. ii. Ordinate is the value of coordinate on the x-axis in a Cartesian coordinate system. iii. Abscissa is the value of coorddinate on the y-axis in a Cartesian coordinate system iv. Abscissa is the value of coordinate on the x-axis in a Cartesian coordinate system
Only i and iv are correct
The hydrolytic degradation of acetylsalicylic acid in its aques suspension follows which kind of kinetic? i. zero order ii. second order iii. pseudo zero order iv. first order
Only ii and iv are correct
The dipole moments of phenacetin, sulfanilamide, and testosterone are 5.67, 5.37, and 4.17. Which one would you expect to be most soluble in water?
Phenacetin
What happens to the volume of a gas when pressure on it was increased 4 times provided temperature was kept constant?
Volume will decrease 4 times
The attractive forces present between___ molecules are called adhesive forces?
Water-air
The closeness of a measured value to the correct value is called
accuracy
Find the correct value for log 2500 a. log(50)^2 = 2 log 50 b. log 250 +log 10 c. 3.398 d. log 25+ log 100 e. [ln2500]/2.303 f. all of the above
all of the above
The forces that bind molecules include i. repulsive and attractive forces ii ion-dipole and ion induced dipole forces hydrogen bonds
all of the above
Which type of solids will dissolve at a greater rate?
amorphous
glass is an example of
amorphous solids
Temperature at which the vapor pressure of a liquid equals to the other external or atmospheric pressure is known as
boiling pt
Hydrogen binds have characteristics of
both ionic and dipolar force
In case of crystalline solids, changes in the freezing or melting point with pressure may be obtained by using
clapeyron equation
Polymorphs are the same substance but in different crystalline forms which are characterized by
different melting points, x-ray diffraction patterns, and solubilty
Sodium chloride and methane are
electrovalent and covalent compound, respectively.
1/100=0.001
false
10000 x infinty=0
false
234x0=234
false
345/0=345
false
7/11<14/22
false
Non electrolytes conduct electricity
false
Polymorphs have different melting point, X-ray diffraction pattern and solubility but same chemical properties
false
Solve and identify the correct answer for the numerical example below 1000 x infinity
infinity
aqueous solubility of iodine in presence of KI is due to
intteractionbetween ion-dipole and ion induced dipole
the intermolecular distance in solid is
less than that in both liquid and gas
log xy=
log x + log y
A substance which is bounded together by weak forces is said to have
low heat of fusion and low melting pt
the crystalline and amorphous solids are characterized by
melting pt and glass transition temperature
In a set of data samples, the data that occurs the most is called
mode
The critical temperature and pressure for CO2 are 31*C and 74.9 atm, repectively. Can you liquefy CO2 stored at 100*C by applying pressure
no
Solving (567^14)^1/7 is best stated as which of the following i. anti log [(1/7) x 14 x log 567] ii. anti log [(1/14) x 7 x log 567]
only i is correct
A gas is stored at 30*C and 2.5 atmosphere. What will happen to pressure when the gas will move to a storage maintained at 60*C? Given the volume of the gas container is 1.5 liters
p2=2.75 atmospheres
Force per unit area is called
pressure
in a pressure cooker, water boils at
temperature significantly higher than 100*C
ln(1)=log(1)=0
the above relationship are correct
The difference between the different states of matter is due to
the intermolecular distance between the molecules
(6^2)^3=6^6
true
1/10=10^-1
true
7 x 10000^0=7
true
A statement such as "not more than 110.0 percent" in the official compendia of the US Pharmacopeia and National Formulary may mean 110.1 or 110.2
true
An unknown compound proceeds from the low melting metastable alpha from the beta form having a higher melting point. However, in storage, it was observed that the beta form reverted ti the metastable alpha form. This kind of polymorphism would be called monotropic
true
In diffusion, molecules move from a region of high concentration to a region of lower concentration due to random molecular motion
true
The concept and rules of significant figures should be applied only when a mathematical operation involves an approximation in a measured quantity
true
When a liquid is placed in a container at a constant temperature, some molecules with the highest energies break away form the surface of the liquid and pass into the vapor state, and some molecules subsequently return to the liquid state, or condense. This statement is
true
nucleation is the pre-reqs for the growth of crystal
true
the glass transition temperature for an amorphous solid is the mid point of the transition in which the solid converts from a glassy to rubber state
true
Solve and identify the correct answer for the numerical example below 1000/infinity
undefined
Clausius -Clapeyron equation for liquids establishes relationships between
vapor pressure and absolute temperature
The arrhenius equation of rheology expresses the relationship between
viscosity and temperature
What happens to the volume of a gas when its temperature is increased 2 times at constant pressure
volume would be double of the original or initial volume
What would be the weight and mass of a 70 Kg person in an elevator going down vertically at the acceleration of 9.81 m/s^2
weight= 0 kg x m/s2; mass =70 kg
Metrology is the science of
weights and measures
