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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

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_______________?

A 10%

B 5%

C 18.18%

D 20%

Review Detailed Answer

Correct Answer: 20%

The vapor pressure of a substance, at its melting point, is _____________ in the solid state as compared to that in the liquid state?

A Less

B More

C Same

D Either A. or B.; depends on the nature of the substance

Review Detailed Answer

Correct Answer: Same

The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?

A 1/2

B 4

C √2

D 1/4

Review Detailed Answer

Correct Answer: √2

The increase in the temperature of the aqueous solution will result in decrease of its________________?

A Weight % of the solute

B Mole fraction of the solute

C Molarity

D Molality

Review Detailed Answer

Correct Answer: Molarity

If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ?

A The solvent begins to freeze out even before

B It will undergo no change until

C It will not solidify even on

D None of these

Review Detailed Answer

Correct Answer: It will undergo no change until

Raoult’s law states that ‘the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component’. This generalisation is based on the assumption that the________________?

A Sizes of the component molecules are approximately equal

B Attractive forces between like and unlike molecules are approximately equal

C Component molecules are non-polar and no chemical combination or molecular association

D All A., B. & C.

Review Detailed Answer

Correct Answer: All A., B. & C.

Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

A Nature of the liquid

B Nature of the gas

C Temperature of the liquid

D Total pressure

Review Detailed Answer

Correct Answer: Nature of the gas

1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is__________________?

A C4H9OH

B C3H21OH

C (C2H4)2H2.OH

D C2H33OH

Review Detailed Answer

Correct Answer: C4H9OH

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________________?

A Mixing

B Adsorption

C Wetting

D Complete wetting

Review Detailed Answer

Correct Answer: Complete wetting

Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the________________?

A Vapor follows the ideal gas law

B Molal latent heat of vaporisation is constant within the limited temperature range

C Volume in the liquid state is negligible compared with that in the vapor state

D All A., B. & C.

Review Detailed Answer

Correct Answer: All A., B. & C.

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

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_______________?

The vapor pressure of a substance, at its melting point, is _____________ in the solid state as compared to that in the liquid state?

The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?

The increase in the temperature of the aqueous solution will result in decrease of its________________?

If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ?

Raoult’s law states that ‘the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component’. This generalisation is based on the assumption that the________________?

Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is__________________?

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________________?

Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the________________?