Multiple Choice Questions on StoichiometryThe Following Section consists of Multiple Choice Questions on Stoichiometry.
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Stoichiometry MCQ
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Question 1 of 20
1. Question
1 pointsColligative properties of a dilute solution are those which depend entirely upon the
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Question 2 of 20
2. Question
1 pointsFor an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).
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Question 3 of 20
3. Question
1 pointsPick out the wrong statement.
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Question 4 of 20
4. Question
1 pointsMeasurement of the amount of dry gas collected over water from volume of moist gas is based on the
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Question 5 of 20
5. Question
1 pointsIn physical adsorption, as compared to chemisorption, the
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Question 6 of 20
6. Question
1 pointsDissolving a solute in a solvent does not change its
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Question 7 of 20
7. Question
1 pointsHeat of transition is the heat evolved or absorbed, when a substance is converted from
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Question 8 of 20
8. Question
1 pointsWhich of the following gravity scales is used exclusively for liquids heavier than water ?
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Question 9 of 20
9. Question
1 pointsWeight of 56 litres of ammonia at N.T.P. is __________ gm.
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Question 10 of 20
10. Question
1 pointsConcentration of a solution expressed in terms of __________ is independent of temperature.
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Question 11 of 20
11. Question
1 pointsHeat of __________ of a fuel is called its calorific value.
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Question 12 of 20
12. Question
1 pointsRecycling in a chemical process facilitates
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Question 13 of 20
13. Question
1 pointsKinetic theory of gases stipulates that, the
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Question 14 of 20
14. Question
1 pointsSolutions having the same osmotic pressure are called __________ solutions.
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Question 15 of 20
15. Question
1 pointsA vapor that exists above its critical temperature is termed as a __________ vapor.
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Question 16 of 20
16. Question
1 pointsAt what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?
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Question 17 of 20
17. Question
1 pointsAn equation for calculating vapour pressure is given by, log10 P = A – B(t + c). This is called the
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Question 18 of 20
18. Question
1 pointsOsmotic pressure of the solution can be increased by
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Question 19 of 20
19. Question
1 pointsA solution with reasonably permanent pH is called a/an __________ solution.
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Question 20 of 20
20. Question
1 pointsA gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be
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Stoichiometry MCQ 2
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Question 1 of 20
1. Question
1 pointsNumber of gm moles of solute dissolved in 1 kg of solvent is called its
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Question 2 of 20
2. Question
1 pointsSize range of the colloidals particles is
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Question 3 of 20
3. Question
1 pointsAssume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is
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Question 4 of 20
4. Question
1 pointsThe value of gas constant ‘R’ is __________ kcal/kg.mole.°C.
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Question 5 of 20
5. Question
1 pointsDiffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume ‘X’ diffuses twice as fast as another perfume ‘Y’; what is the molecular weight of ‘Y’, if the vapor density of gas ‘X’ is 2 ? Molecular weight of gas ‘X’ is to be assumed to be 2.
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Question 6 of 20
6. Question
1 pointsKopp’s rule is helpful in finding the
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Question 7 of 20
7. Question
1 pointsNumber of gm moles of solute dissolved in one litre of a solution is called its
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Question 8 of 20
8. Question
1 pointsA chemical process is said to occur under unsteady state, if the
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Question 9 of 20
9. Question
1 points1 centipoise is equivalent to
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Question 10 of 20
10. Question
1 pointsThe temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
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Question 11 of 20
11. Question
1 pointsIsotonic solutions must have the same
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Question 12 of 20
12. Question
1 pointsThe vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is
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Question 13 of 20
13. Question
1 pointsFor estimation of heat capacity of a solid compound, one can use
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Question 14 of 20
14. Question
1 pointsWith increase in the temperature of pure (distilled) water, its
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Question 15 of 20
15. Question
1 pointsValidity of the relationship, inputs = outputs, holds good for the system at steady state
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Question 16 of 20
16. Question
1 points1 torr is equal to __________ mm Hg column.
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Question 17 of 20
17. Question
1 pointsAt 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be
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Question 18 of 20
18. Question
1 pointsWhich of the following ratios defines the recycle ratio in a chemical process ?
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Question 19 of 20
19. Question
1 pointsNaOH contains __________ percent oxygen.
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Question 20 of 20
20. Question
1 pointsThe pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
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Stoichiometry MCQ 3
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Question 1 of 20
1. Question
1 pointsHess’s law of constant heat summation is based on conservation of mass. It deals with
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Question 2 of 20
2. Question
1 points“The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of
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Question 3 of 20
3. Question
1 pointsA bypass stream in a chemical process is useful, because it
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Question 4 of 20
4. Question
1 pointsWhat is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively ?
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Question 5 of 20
5. Question
1 pointsAn azeotropic solution of two liquids has boiling point lower than either of them, when it
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Question 6 of 20
6. Question
1 pointsPick out the wrong statement:
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Question 7 of 20
7. Question
1 pointsThe equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the
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Question 8 of 20
8. Question
1 pointsA liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
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Question 9 of 20
9. Question
1 pointsA vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
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Question 10 of 20
10. Question
1 pointsSometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the
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Question 11 of 20
11. Question
1 pointsA gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.
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Question 12 of 20
12. Question
1 pointsIn case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is
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Question 13 of 20
13. Question
1 pointsMolality is defined as the number of gm moles of solute per __________ of solvent.
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Question 14 of 20
14. Question
1 pointsAt a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to
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Question 15 of 20
15. Question
1 points‘Cox’ chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the
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Question 16 of 20
16. Question
1 pointsIn case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
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Question 17 of 20
17. Question
1 pointsIf the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
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Question 18 of 20
18. Question
1 pointsA solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of
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Question 19 of 20
19. Question
1 pointsThe vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg. ?
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Question 20 of 20
20. Question
1 points2 litres of nitrogen at N.T.P. weighs __________ gms.
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Stoichiometry MCQ 4
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Question 1 of 20
1. Question
1 pointsWhich of the following is followed by an ideal solution ?
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Question 2 of 20
2. Question
1 pointsOne of the specific gravity scales is “Brix” (used speicifically for sugar solution). It is defined as
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Question 3 of 20
3. Question
1 pointsPick out the correct conversion.
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Question 4 of 20
4. Question
1 pointsThe maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
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Question 5 of 20
5. Question
1 pointsWhich of the following is not used for computing latent heat of vaporisation ?
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Question 6 of 20
6. Question
1 pointsThe reverse process of fractional crystallisation is called
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Question 7 of 20
7. Question
1 pointsFor water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
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Question 8 of 20
8. Question
1 points“The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes”. This is the __________ law.
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Question 9 of 20
9. Question
1 pointsThe atomic heat capacities of all solid elements __________ with decrease in temperature.
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Question 10 of 20
10. Question
1 points°API gravity of water at N.T.P. is about
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Question 11 of 20
11. Question
1 pointsNo cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
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Question 12 of 20
12. Question
1 pointsThe heat capacity of a substance is
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Question 13 of 20
13. Question
1 pointsAt a temperature of 0°K, the molecules of a gas have only __________ energy.
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Question 14 of 20
14. Question
1 pointsA butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be
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Question 15 of 20
15. Question
1 points“The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface”. This statement pertaining to the solubility of gases in liquid is the __________ law.
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Question 16 of 20
16. Question
1 pointsThe most convenient way of expressing solution concentration is in terms of
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Question 17 of 20
17. Question
1 pointsWith increase in temperature, the surface tension of water
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Question 18 of 20
18. Question
1 pointsEnthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of
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Question 19 of 20
19. Question
1 pointspH value of a solution containing 1 gm of hydrogen ion per litre will be
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Question 20 of 20
20. Question
1 points__________ chart is a graph related to Antonie equation.
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