chemical engineering MCQs – Page 424

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 Review each marked answer and report any item that may be outdated or unclear.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
8461. Internal energy is independent of the ____________ for an ideal gas?
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A. Pressure

B. Volume

C. Both A. & B.

D. Neither A. nor B.

8462. For a multi-component system, the term chemical potential is equivalent to the ___________________?
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A. Molar free energy change

B. Partial molar free energy

C. Molal concentration difference

D. Molar free energy

8463. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?
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A. Decreases

B. Remains constant

C. Increases

D. Decreases logarithmically

8464. The standard state of a gas (at a given temperature) is the state in which fugacity is equal to__________________?
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A. Unity

B. Activity

C. Both A. & B

D. Neither A. nor B

8465. Number of phases in a colloidal system is_____________________?
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A. 1

B. 2

C. 3

D. 4

8466. Filling of gas from a high pressure cylinder into small bottles is an example of a/an ______________ process?
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A. Steady

B. Unsteady

C. Equilibrium

D. Adiabatic

8467. The OH- concentration in a solution having pH value 3 is____________________?
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A. 10-Oct

B. 10-11

C. 13-Oct

D. 3-Oct

8468. A gas shows deviation from ideal behaviour at______________?
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A. Low temperature and high pressure

B. High temperature and high pressure

C. Low pressure and low temperature

D. Low pressure and high temperature

8469. The expression for entropy change, ?S = n Cp . ln (T2/T1), is valid for the ______________ of a substance?
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A. Simultaneous pressure & temperature change

B. Heating

C. Cooling

D. Both B. and C
8470. Degree of freedom of the system ice-water-vapour will be ________________?
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A. 0

B. 2

C. 1

D. 3

8471. The activity of an ideal gas is numerically ____________ its pressure?
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A. Equal to

B. Less than

C. Data insufficient, cant be predicted

D. More than

8472. The expression, nCv(T2 T1), is for the _____________ of an ideal gas?
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A. Compressibility

B. Co-efficient of thermal expansion

C. None of these

D. Work done under adiabatic condition
8473. Heat of reaction is not influenced by__________________?
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A. The route/method through which final products are obtained

B. The physical state (e.g., solid, liquid or gaseous) of reactants and products

C. Whether the reaction is carried out at constant temperature or constant pressure

D. None of these

8474. (1/V) (?V/?T)P is the mathematical expression__________________?
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A. Joule-Thomson co-efficient

B. Specific heat at constant volume (CV)

C. co-efficient of thermal expansion

D. Specific heat at constant pressure (Cp)

8475. Pick out the wrong statement ?
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A. At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

B. Normally, the gases which are easily liquefied are more soluble in common solvents

C. The gases which are capable of forming ions in aqueous solution are much more soluble in

D. er than in other solvents

E. At constant pressure, solubility of a gas in a liquid increases with rise in temperature

8476. Joule-Thomson co-efficient depends on the_____________________?
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A. Pressure

B. Temperature

C. Both A. & B

D. Neither A. nor B

8477. In a reversible process__________________?
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A. Tds = dE + dW

B. dW dE = Tds

C. Tds dW + dE >0

D. dE dW = Tds

8478. Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass ?
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A. dQ = CpdT + Vdp

B. Tds = dE PdV

C. dQ = CvdT + PdV

D. dE = Tds PdV
8479. Pick out the wrong statement ?
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A. rogen is 4

B. Enthalpy and internal energy change is zero during phase change processes like melting,

C. For a two phase system in equilibrium made up of four non-reacting chemical species, the

D. orisation and sublimation</strong>

E. ber of degrees of freedom is 4

F. Minimum number of degree of freedom of a system is zero

8480. Throttling (Joule-Thomson effect) process is a constant _____________ process?
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A. Entropy

B. Pressure

C. Enthalpy

D. None of these