chemical engineering MCQs – Page 428

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 Review each marked answer and report any item that may be outdated or unclear.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
8541. Pick out the correct statement ?
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A. hanged

B. Work is a state function

C. Entropy and enthalpy are path functions

D. All the natural processes are reversible in nature

E. In a closed system, the energy can be exchanged with the surrounding, while matter cannot be

8542. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour________________?
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A. Measures the elevation in boiling point

B. Is a function of the liquid phase composition

C. Is not dependent on the temperature

D. Measures the depression in freezing point

8543. In _______________ process, ions of salts react with water to produce acidity or alkalinity ?
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A. Hydration

B. Hydrolysis

C. Dialysis

D. Electrolysis

8544. A source rock that is too immature to generate petroleum in its natural setting is known as__________?
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A. Effective Source Rock

B. Potential Source Rock

C. Unconventional Source Rock

D. All of above

8545. In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?
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A. Decrease

B. Increase

C. None of these

D. Remain unchanged

8546. Pick out the wrong statement?
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A. s compared to that for strong acids and bases

B. a</strong>

C. solution of the anhydrous substance and its heat of hydration

D. ure & amount of the solute & the solvent, on the temperature & on the initial & final

E. centrations of the solution

F. The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the

8547. The equilibria relations in a multi-component and multiphase system cannot be calculated with the help of the_______________?
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A. Theoretical equations

B. Empirical equations

C. Phase rule

D. Experimental data

8548. Isotopes are atoms having the same _____________________?
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A. None of these

B. Number of neutrons

C. Atomic mass

D. Mass number

8549. Addition of a non-volatile solute to a pure solvent ____________________?
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A. Increases its freezing point

B. Increases its boiling point

C. Decreases its freezing point

D. Both B. and C.
8550. The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?
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A. 1 Kcal

B. Latent heat

C. Sensible heat

D. Specific heat

8551. Atmospheric pressure corresponds to a hydrostatic head of_________________?
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A. 1 metre of H2O

B. 34 ft ofH2O

C. 13.6 cms of Hg

D. 13.6 metres of Hg

8552. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?
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A. Coke Oven Gas

B. Pulverised coke

C. Sulphide Coke

D. Tar

8553. Pick out the correct statement ?
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A. Heat, work, enthalpy and entropy are all state functions

B. Matter and energy cannot be exchanged with the surroundings in a closed system

C. In an isothermal system, irreversible work is more than reversible work

D. Under reversible conditions, the adiabatic work is less than isothermal work
8554. A sugar solution containing _________________ percent sugar is equivalent to 1 Brix?
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A. 0.01

B. 1

C. 0.1

D. 10

8555. A gas at 0C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be________________?
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A. -136.5K

B. -136.5C

C. 0K

D. 0C

8556. pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?
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A. 0

B. 10

C. 7

D. 1

8557. Enthalpy of formation of NH3 is 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 ? N2 + 3H2, is equal to _____________ kJ/kg. mole?
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A. -92

B. -23

C. 92

D. 46

8558. Pick out the wrong statement?
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A. The evaporation of aqueous solution of glucose causes its molarity to increase

B. Both the freezing point as well as boiling point of sea water is more than that of distilled water

C. The solution containing equal masses of two liquids X and Y has the same mole fraction of

D. 216;X and Y

E. Both B. and C.
8559. Pick out the wrong statement?
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A. The net change in entropy in any reversible cycle is always zero

B. The entropy of the system as a whole in an irreversible process increases

C. The entropy of the universe tends to a maximum

D. The entropy of a substance does not remain constant during a reversible adiabatic change
8560. Disappearance of snow in subzero weather exemplifies the process of_________________?
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A. Evaporation

B. Vaporisation

C. Sublimation

D. Melting