chemical engineering MCQs – Page 434

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
8661. Pick out the wrong conversion formula for the conversion of weight units ?
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A. None of these

B. 1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton

C. 1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons

D. 1 tonne = 1000 kg = 22.046 lbs

8662. If 1 Nm3 of O2 contains N number of molecules, then number of molecules in 2Nm3 of SO2 will be_________________?
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A. 2N

B. N/2

C. 4N

D. N

8663. RIH stands for ________?
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A. Run in hole

B. None of these

C. Rest in hole

D. Rip in hole

8664. Air at a temperature of 20C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20C is 17.5 mm Hg?
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A. 80.38

B. 79.62

C. 80

D. 78.51

8665. Pick out the wrong statement?
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A. Inhalation of pollutant carbon monoxide results in death by asphyxiation

B. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles

C. osphere

D. aust emissions

E. Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in

F. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in

8666. S.T.P. corresponds to _________________?
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A. 1 atm. absolute pressure & 15.5C

B. 760 mm Hg gauge pressure & 15.5C

C. 101.325 kPa gauge pressure & 15.5C

D. 760 torr & 0C

8667. Pick out the wrong statement?
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A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven

B. omobile exhaust

C. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light

D. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees

E. H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is

F. dised to SO2</strong>

8668. 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___________________?
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A. Will be greater than 298 K

B. Cannot be determined

C. Will be less than 298 K

D. Will be 298 K

8669. The value of gas constant R is ______________ kcal/kg.mole.C?
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A. None of these

B. 2.79

C. 1.987

D. 3.99

8670. Addition of a non-volatile solute to a solvent produces a ______________ in its solvent?
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A. Boiling point depression

B. Vapor pressure lowering

C. All A., B. & C.

D. Freezing point elevation

8671. The viscosity of water at room temperature may be around one ___________________?
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A. Centipoise

B. Poise

C. Stoke

D. Both B. & C.

8672. The depression in freezing point of a solution is________________?
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A. Inversely proportional to the mass of solvent

B. Directly proportional to the mole of solute

C. Both A. and B.

D. Neither A. nor B.

8673. Pick out the wrong statement?
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A. ides the source & sink temperatures</strong>

B. #NAME?

C. During a reversible adiabatic process, the entropy of a substance remains constant

D. Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure,

E. The values of (?P/?V)T and (?2P/?V2)T are zero for a real gas at its critical point

F. Thermal efficiency of a Carnot engine depends upon the properties of the working fluid
8674. The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?
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A. 2-Jan

B. 4-Jan

C. ?2

D. 4

8675. Pick out the extensive property out of the following ?
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A. Free energy

B. Specific heat

C. Surface tension

D. Refractive index

8676. Pick out the correct statement ?
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A. Lightening discharges are natural source of production of SO2 & H2S pollutant

B. lone</strong>

C. Sulphur dioxide causes death by asphyxiation

D. Global warming is detrimental for increase in food productivity and may cause flood and

E. Deforestation helps in controlling the green house effect

8677. According to Raoults law, The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component. Raoults law is not applicable under the following assumption/condition?
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A. The attractive forces between like and unlike molecules are almost equal

B. In the formation of solution, chemical combination/molecular association between unlike

C. The component molecules are non polar and are of almost equal size

D. No component is concentrated at the surface of the solution

E. ecules takes place</strong>

8678. One Therm is equivalent to___________________?
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A. 105 BTU

B. 109 BTU

C. 109 kcal

D. 105 kcal

8679. Pick out the wrong statement?
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A. An equation relating pressure, volume and temperature of a gas is called ideal gas equation

B. Thermal efficiency of a Carnot engine is always less than 1

C. None of these

D. Troutons ratio of non-polar liquids is calculated using Kistyakowsky equation

8680. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________?
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A. Total pressure

B. Absolute humidity at a given temperature

C. Both A. and B.

D. Neither A. nor B.