chemical engineering MCQs – Page 433

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 Review each marked answer and report any item that may be outdated or unclear.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

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

8651. The equilibrium data of component A in the two phases B and C are given below. The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is ____________________?
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A. 16.5

B. 16

C. 15.5

D. 17

8652. Normality of a solution does not change with the increase in the __________________?
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A. Pressure

B. Temperature

C. Solute concentration

D. Dilution of the solution

8653. 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___________________?
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A. Trebled

B. Unpredictable

C. Halved

D. Doubled

8654. Number of gm moles of solute dissolved in one liter of a solution is called its____________________?
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A. Equivalent weight

B. Molarity

C. Normality

D. Molality

8655. Average molecular weight of air is about ____________________?
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A. 29

B. 79

C. 23

D. 21

8656. As per Kirchhoff s equation, the heat of reaction is affected by the__________________?
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A. Molecularity

B. Volume

C. Temperature

D. Pressure

8657. What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25C ?
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A. 3-Feb

B. 1/3

C. 2-Jan

D. 1/3 (298/273)

8658. _________________ chart is a graph related to Antoine equation ?
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A. Enthalpy-concentration

B. Molliers

C. Cox

D. Ostwald

8659. Which of the following is not a unit of kinematic viscosity ?
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A. Stoke

B. cm2/second

C. Poise

D. None of these

8660. An ideal gas can be liquefied, because ___________________?
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A. Its molecular size is very small

B. Its critical temperature is more than 0C

C. Forces operative between its molecules are negligible

D. It gets solidified directly without becoming liquid

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