chemical engineering Mcqs
8601. ______________ equation gives the effect of temperature on heat of reaction ?
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A. Maxwells

B. Kistyakowsky

C. Kirchoffs

D. Antoine

8602. Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263C and 2 atm ?
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A. 2

B. 3

C. 4

D. 1

8603. Which of the following rock favors petroleum formation?
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A. Igneous rock

B. Metamorphic rock

C. None of these

D. Sedimentary rock
8604. The most convenient way of expressing solution concentration is in terms of___________________?
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A. Mole fraction

B. Normality

C. Molarity

D. Molality

8605. The most blister form of copper is__________?
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A. refined copper

B. impure copper

C. none of these

D. processed copper

8606. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?
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A. 164

B. 8.2

C. 82

D. 41

8607. For the gaseous phase reaction, N2 + O2 ? 2NO, ?H = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________?
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A. Decrease in pressure

B. Decrease in temperature

C. Increasing the concentration of N2

D. Increase in pressure

8608. 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___________________?
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A. Bubble point

B. Saturation temperature

C. Dew point

D. Both B. and C.
8609. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?
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A. Exert no attractive force on each other

B. Are above the inversion temperature

C. Collide without loss of energy

D. Do work equal to loss in kinetic energy

8610. If pH value of a solution is 8, then its pOH value will be ____________________?
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A. 10

B. 1

C. 7

D. 6
8611. Percentage saturation of a vapor bearing gas is always _____________ the relative saturation?
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A. Either A. or B.; depends on the system

B. Smaller than

C. Equal to

D. Higher than

8612. With increase in temperature, the surface tension of water _____________________?
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A. Remain constant

B. Decreases

C. Increases linearly

D. Increases

8613. 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________________?
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A. Complete wetting

B. Adsorption

C. Wetting

D. Mixing

8614. 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_________________?
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A. 6 kmole/hr

B. 4 kmole/hr

C. 3 kmole/hr

D. 5 kmole/hr
8615. Pick out the wrong statement?
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A. perature at which heat is rejected increases

B. Refrigeration cycle is normally represented by a temperature vs. entropy plot

C. In a refrigerator, work required decreases as the temperature of the refrigerator and the

D. A refrigeration cycle violates the second law of thermodynamics

E. One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW

8616. Pick out the correct statement ?
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A. e than the partial pressure of the vapor at the same temperature

B. Heat added to or given up by a substance at constant temperature is called the sensible heat

C. The end points of a vapor-pressure vs. temperature curve are critical and triple points

D. A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is

E. A substance existing above its critical temperature is called a saturated vapor

8617. Vapor pressure of water at 100C is about _______________ bar?
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A. 10.13

B. 0.1013

C. 1.013

D. 101.3

8618. Pick out the wrong statement ?
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A. Coals are divided in four species according to their carbon content in Seylors classification

B. Carburetted water gas is also called blue gas

C. Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or

D. Carbonisation time in a by-product coke oven is about 16 hours

E. rocarbons

8619. How much O2 can be obtained from 90 kg of water ?
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A. 80 kg

B. 64 kg

C. 90 kg

D. 32 kg

8620. Boiling point of a solution as compared to that of the corresponding solvent is _________________?
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A. Less

B. Either more or less; depends upon the solvent

C. More

D. Same

8621. The latent heat of vaporisation__________________?
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A. Becomes zero at the critical point

B. All A., B. & C.

C. Decreases with increased temperature

D. Decreases as pressure increases

8622. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent ?
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A. Temperature

B. Nature of solute

C. Nature of solvent

D. Pressure
8623. 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_______________?
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A. 18.18%

B. 20%

C. 10%

D. 5%

8624. Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?
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A. P + (a/V2)

B. 1/RT

C. RT

D. (V b)

8625. Pick out the wrong statement ?
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A. ogenic method

B. per-Totzek process of coal gasification

C. Percentage of ash in coke produced from medium coking coal is more than that in coal

D. Coal based fertiliser plants in India at Talcher (Orissa) and Ramagundam (A.P) employ

E. The calorific value (kcal/Nm3) of coke oven gas reduces on removal of hydrogen from it by

F. Ash is normally removed as fly-ash in Kopper-Totzek process of coal gasification
8626. Pick out the wrong unit conversion ?
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A. 1 Pascal second = 10 poise

B. 1 stoke = 1 m2/second

C. 1 ppm = 1 ml/m3 = 1 mg/kg

D. 1 kgf= 9.8 Newton

8627. Pick out the wrong statement ?
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A. Mesosphere is characterised by very low atmospheric pressure and low temperature

B. The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in

C. atosphere</strong>

D. ne

E. Troposphere is a dusty zone containing water vapor and clouds

F. The radio waves used in the long distance radio communication are reflected back to earth by
8628. Number of gm moles of solute dissolved in 1 kg of solvent is called its___________________?
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A. Molality

B. Molarity

C. Normality

D. Formality

8629. Pick out the wrong statement ?
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A. pared to the two stroke engines

B. Environmental pollution by NOx emission is much higher by four stroke petrol engines as

C. Temperature in stratosphere rises with increasing altitude

D. mical oxygen demand (C.O.D.) value

E. iation to come in but does not allow the short wavelength infra red radiation to escape out

F. Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its

8630. Maximum heat transfer rate can be expected in case of_________?
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A. Turbulent flow

B. Laminar flow

C. Heat flow rate is independent of nature of flow

D. Co-current flow

8631. At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?
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A. 8

B. 12

C. 10

D. 6

8632. Solutions which distil without change in composition are called________________?
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A. Azeotropic

B. Saturated

C. Ideal

D. Supersaturated

8633. Heat of solution in a system in which both solute and solvent are liquids is termed as_________________?
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A. Standard integral heat of solution

B. Heat of mixing

C. Heat of hydration

D. Heat of solvation

8634. 1 Pascal (unit of pressure) is equal to _______________ N/m2 ?
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A. 10

B. 1000

C. 1

D. 0.1

8635. 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 ?
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A. 8

B. 1

C. 2

D. 4

8636. The temperature at which the second Virial co-efficient of a real gas is zero is called the_____________________?
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A. Boyle temperature

B. Critical temperature

C. Boiling point

D. Eutectic point
8637. Hesss law of constant heat summation is based on conservation of mass. It deals with ___________________?
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A. Reaction rate

B. Changes in heat of reaction

C. None of these

D. Equilibrium constant

8638. Sodium ______________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature?
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A. Thiosulphate

B. Bisulphite

C. Chloride

D. Carbonate (monohydrate)
8639. Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0C will be _______________ atmosphere?
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A. 0.5

B. 2

C. 1.5

D. 1
8640. Total energy at a point comprises of _____________ energy?
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A. Potential & kinetic

B. All A., B. & C.

C. Pressure

D. Internal

8641. Elements in a periodic table are arranged in order of their__________________?
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A. Mass number

B. Metallic characteristics

C. Atomic number

D. Atomic weight

8642. 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?
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A. Total energy

B. Intermolecular forces

C. Kinetic energy

D. Potential energy

8643. 1 Kcal/kg. C is equivalent to _______________ BTU/lb. F ?
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A. 1

B. 2.42

C. 4.97

D. None of these

8644. 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?
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A. 44

B. 1

C. 0

D. 16

8645. Pick out the wrong statement ?
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A. Henrys law is rigorously correct in the limit of infinite dilution

C. None of these

D. lied to the other component also

E. If Raoults law is applied to one component of a binary mixture; Henrys law or Raoults law is

F. An ideal liquid or solid solution is defined as one in which each component obeys Raoults

8646. Density of carbon dioxide is _________________ kg/Nm3 ?
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A. 22.4/44

B. None of these

C. 44/22.4

D. 44/22400

8647. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) _______________ with increase in temperature?
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A. Does not vary

B. Increases

C. Varies linearly

D. Decreases

8648. The vapor pressure of liquids of similar chemical nature at any particular temperature _______________ with increase in the molecular weight?
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A. Either A. or B.; depends on the liquid

B. Remains unchanged

C. Increases

D. Decreases
8649. Atomic ______________ of an element is a whole number?
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A. Weight

B. Volume

C. Number

D. Radius

8650. The value of (Cp Cv) for a real gas obeying Vander Walls equation is____________________?
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A. 0.5 R

B. R

C. > R

D. < R