New Chemical Engineering MCQs – Most Latest Stoichiometry MCQs
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Latest Chemical Engineering MCQs
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Latest Stoichiometry Mcqs
The most occurred mcqs of Stoichiometry in past papers. Past papers of Stoichiometry Mcqs. Past papers of Stoichiometry Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Stoichiometry Mcqs. The Important series of Stoichiometry Mcqs are given below:
Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________?
A. 1
B. ∞
C. 0
D. None of these
The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?
A. Relative saturation
B. Relative humidity
C. Percentage saturation
D. None of these
Density of carbon dioxide is _________________ kg/Nm3 ?
A. 22.4/44
B. 44/22.4
C. 44/22400
D. None of these
No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?
A. Do work equal to loss in kinetic energy
B. Collide without loss of energy
C. Are above the inversion temperature
D. Exert no attractive force on each other
Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is___________________?
A. 1/2
B. 8/9
C. 1/9
D. 5/9
pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?
A. 0
B. 7
C. 1
D. 10
A sugar solution containing _________________ percent sugar is equivalent to 1 Brix?
A. 0.1
B. 0.01
C. 1
D. 10
The 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 vaporised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is_________________?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
The heat capacity of most substances is greater for the _______________ state?
A. Gaseous
B. Liquid
C. Solid
D. None of these
Isotopes are atoms having the same _____________________?
A. Number of neutrons
B. Mass number
C. Atomic mass
D. None of these
Which of the following is not a unit of kinematic viscosity ?
A. Poise
B. cm2/second
C. Stoke
D. None of these
Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be _______________ atmosphere?
A. 1.5
B. 1
C. 0.5
D. 2
With increase in the solute concentration, the specific heat of aqueous solutions _____________________?
A. Remains unchanged
B. Decreases
C. Increases
D. Either A. or B.; depends on the type of solution
In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest ?
A. 30 c.c acid and 30 c.c base
B. 15 c.c acid and 35 c.c base
C. 20 c.c acid and 25 c.c base
D. 35 c.c acid and 15 c.c base
Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?
A. RT
B. (V – b)
C. P + (a/V2)
D. 1/RT
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) _______________ with increase in temperature?
A. Decreases
B. Increases
C. Varies linearly
D. Does not vary
The depression in freezing point of a solution is________________?
A. Directly proportional to the mole of solute
B. Inversely proportional to the mass of solvent
C. Both A. and B.
D. Neither A. nor B.
Normality of a solution does not change with the increase in the __________________?
A. Pressure
B. Solute concentration
C. Temperature
D. Dilution of the solution
Which of the following has the smallest least effect on the solubility of a solute into the solvent ?
A. Nature of the solvent
B. Nature of the solute
C. Temperature
D. Pressure
What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?
A. AB3
B. A2B
C. A2B3
D. AB2
How much O2 can be obtained from 90 kg of water ?
A. 64 kg
B. 80 kg
C. 32 kg
D. 90 kg
Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is_________________?
A. 0.5
B. 0.58
C. 1.72
D. 0.2
One ‘Therm’ is equivalent to___________________?
A. 105 BTU
B. 109 BTU
C. 105 kcal
D. 109 kcal
The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?
A. < R
B. > R
C. R
D. 0.5 R
In _______________ process, ions of salts react with water to produce acidity or alkalinity ?
A. Electrolysis
B. Hydrolysis
C. Hydration
D. Dialysis
For the gaseous phase reaction, N2 + O2 ⇌ 2NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________?
A. Increase in pressure
B. Decrease in temperature
C. Increasing the concentration of N2
D. Decrease in pressure
1 Kcal/kg. °C is equivalent to _______________ BTU/lb. °F ?
A. 1
B. 4.97
C. 2.42
D. None of these
Process Equipment And Plant Design Mcqs
A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO2, 0.05 gm mole of oxygen and 0.80 gm mole of N2. What is its molecular weight ?
A. 30.0
B. 28.6
C. 30.6
D. 32.6
A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be________________?
A. 0°K
B. 0°C
C. -136.5°C
D. -136.5°K
500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be _____________ mm Hg?
A. 650
B. 600
C. 700
D. 375
A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?
A. 760
B. 630
C. 380
D. 880
Sodium ______________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature?
A. Carbonate (monohydrate)
B. Thiosulphate
C. Chloride
D. Bisulphite
The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is _____________ kg mole?
A. 16
B. 0
C. 1
D. 44
According to the kinetic theory, the thermal conductivity of a monatomic gas is proportional to___________________?
A. T1.5
B. T0.5
C. T
D. T2
Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent ?
A. Nature of solute
B. Temperature
C. Pressure
D. Nature of solvent
Volume occupied by one gm mole of a gas at S.T.P. is ____________________?
A. 22.4 litres
B. 22.4 c.c
C. 22400 litres
D. 359 litres
In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?
A. 720
B. 60.3
C. 180
D. 200
The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?
A. 0.09
B. 0.07
C. 0.11
D. 0.13
Disappearance of snow in subzero weather exemplifies the process of_________________?
A. Vaporisation
B. Sublimation
C. Evaporation
D. Melting
The most convenient way of expressing solution concentration is in terms of___________________?
A. Normality
B. Mole fraction
C. Molality
D. Molarity
Elements in a periodic table are arranged in order of their__________________?
A. Atomic number
B. Atomic weight
C. Mass number
D. Metallic characteristics
Stoichiometry Mcqs
Unit of mass velocity is___________________?
A. kg/hr
B. kg/m2.hr
C. kg/m.hr
D. kg/m2
In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?
A. Kg-mole of solute/kg-mole of solvent
B. Kg of solute/kg of solvent
C. Kg-mole of solute/1000 kg of solvent
D. All A., B. & C.
The value of gas constant ‘R’ is ______________ kcal/kg.mole.°C?
A. 1.987
B. 2.79
C. 3.99
D. None of these
Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively) ?
A. Sv
B. St
C. 1/St
D. 1/Sv
A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?
A. 0.66
B. 0.33
C. 0.16
D. 0.47
Number of gm moles of solute dissolved in one liter of a solution is called its____________________?
A. Molality
B. Molarity
C. Equivalent weight
D. Normality
In a neutral solution _________________?
A. OH- ions are absent
B. H+ ions are absent
C. Both H+ and OH- ions are present in very small but equal concentration
D. None of these
Hess’s law of constant heat summation is based on conservation of mass. It deals with ___________________?
A. Reaction rate
B. Equilibrium constant
C. Changes in heat of reaction
D. None of these
A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be _____________ kgf/cm2 ?
A. 1
B. 4
C. 2
D. 8
The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?
A. Halved
B. Doubled
C. Trebled
D. Unpredictable
Total energy at a point comprises of _____________ energy?
A. Pressure
B. Potential & kinetic
C. Internal
D. All A., B. & C.
Which of the following is not a colligative property ?
A. Depression of freezing point
B. Osmotic pressure
C. Lowering of vapor pressure
D. None of these
Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?
A. Are above the inversion temperature
B. Do not lose energy on collision
C. Do not exert attractive force on each other
D. Do work equal to loss in kinetic energy
The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?
A. 1 Kcal
B. Specific heat
C. Sensible heat
D. Latent heat
1 torr is equal to ______________ mm Hg column?
A. 1
B. 10
C. 0.1
D. 1000
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?
A. xB.Patm
B. xB.PvB
C. (Patm – Pvw)xB
D. PvB
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?
A. Bubble point
B. Dew point
C. Saturation temperature
D. Both B. and C.
Addition of a non-volatile solute to a pure solvent ____________________?
A. Increases its freezing point
B. Decreases its freezing point
C. Increases its boiling point
D. Both B. and C.
Mass Transfer Mcqs
______________ equation gives the effect of temperature on heat of reaction ?
A. Kirchoff’s
B. Antoine
C. Maxwell’s
D. Kistyakowsky
“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?
A. Amagat’s
B. Henry’s
C. Raoult’s
D. None of these
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container___________________?
A. Will be 298 K
B. Will be greater than 298 K
C. Will be less than 298 K
D. Cannot be determined
As per Kirchhoff s equation, the heat of reaction is affected by the__________________?
A. Volume
B. Pressure
C. Temperature
D. Molecularity
The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?
A. 9.03
B. 1.204
C. 3.01
D. 6.02
The heat capacity of a substance is ____________________?
A. Greater for liquid state than for solid state
B. Higher for solid state than for liquid state
C. Lower for liquid state than for gaseous state
D. Equal for solid and liquid states below melting point
If 1 Nm3 of O2 contains ‘N’ number of molecules, then number of molecules in 2Nm3 of SO2 will be_________________?
A. N/2
B. N
C. 2N
D. 4N
Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature ?
A. Nitrogen
B. Chlorine
C. Ethane
D. All the gases will have the same KE
In a chemical process, the recycle stream is purged for______________________?
A. Enriching the product
B. Increasing the product yield
C. Limiting the inerts
D. Heat conservation
pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?
A. 10
B. 0
C. 7
D. 14
The heat of solution depends upon the____________________?
A. Concentration of solution
B. Nature of solvent
C. Nature of solute
D. All A., B. & C.
Enthalpy 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________________?
A. Adsorption
B. Mixing
C. Wetting
D. Complete wetting
Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?
A. Temperature of the liquid
B. Nature of the gas
C. Nature of the liquid
D. Total pressure
If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ?
A. It will not solidify even on
B. It will undergo no change until
C. The solvent begins to freeze out even before
D. None of these
The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?
A. 4
B. 1/2
C. √2
D. 1/4
The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be_______________?
A. 5%
B. 10%
C. 18.18%
D. 20%
_________________ chart is a graph related to Antoine equation ?
A. Mollier’s
B. Cox
C. Ostwald
D. Enthalpy-concentration
The viscosity of water at room temperature may be around one ___________________?
A. Centipoise
B. Stoke
C. Poise
D. Both B. & C.
80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is_________________?
A. 0.24
B. 0.18
C. 0.00
D. 1.00
Clausius Clapeyron equation applies to the _____________ process?
A. Melting
B. Sublimation
C. Vaporisation
D. All A., B. & C.
Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20°C is 17.5 mm Hg?
A. 80
B. 80.38
C. 79.62
D. 78.51
The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?
A. 2M
B. M
C. M/2
D. M/4
Atmospheric pressure corresponds to a hydrostatic head of_________________?
A. 1 metre of H2O
B. 34 ft ofH2O
C. 13.6 cms of Hg
D. 13.6 metres of Hg
On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?
A. 82
B. 41
C. 164
D. 8.2
At a temperature of 0°K, the molecules of a gas have only _______________ energy?
A. Vibrational
B. Rotational
C. Translational
D. None of these
Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?
A. 32.2
B. 20
C. 45.35
D. 58.65
The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?
A. Intermolecular forces
B. Potential energy
C. Kinetic energy
D. Total energy
A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. 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_________________?
A. 4 kmole/hr
B. 3 kmole/hr
C. 5 kmole/hr
D. 6 kmole/hr