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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.

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?

A 13728 J

B 19206 J

C 4576 J

D 12712 J

Review Detailed Answer

Correct Answer: 19206 J

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?

A 46

B 92

C -23

D -92

Review Detailed Answer

Correct Answer: 92

Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

A Are held together by stronger inter-molecular forces

B Move faster

C Have no definite shape

D Are heavier

Review Detailed Answer

Correct Answer: Are held together by stronger inter-molecular forces

If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?

A Be reduced to 1/4th

B Increase four times

C Increase two times

D None of these

Review Detailed Answer

Correct Answer: Increase two times

Heat of reaction is not influenced by__________________?

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

Review Detailed Answer

Correct Answer: The route/method through which final products are obtained

A ‘limiting reactant’ is the one, which decides the ____________ in the chemical reaction?

A Equilibrium constant

B Conversion

C Rate constant

D None of these

Review Detailed Answer

Correct Answer: Conversion

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to___________________?

A Decrease in mean free path

B Increased collision rate among molecules

C Increase in molecular attraction

D Increase in average molecular speed

Review Detailed Answer

Correct Answer: Increase in molecular attraction

1 torr is equivalent to_________________?

A 1 mm Hg

B 1 Pascal

C 1 atm

D 1 mm wc

Review Detailed Answer

Correct Answer: 1 mm Hg

An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?

A 0.2500

B 0.2528

C 0.5000

D 0.5055

Review Detailed Answer

Correct Answer: 0.5055

The density of a gas at N.T.P.is ‘ρ’. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75 ρ at a temperature of ____________ °K?

A 273°

B 300°

C 400°

D 373°

Review Detailed Answer

Correct Answer: 400°

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?

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?

Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?

Heat of reaction is not influenced by__________________?

A ‘limiting reactant’ is the one, which decides the ____________ in the chemical reaction?

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to___________________?

1 torr is equivalent to_________________?

An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?

The density of a gas at N.T.P.is ‘ρ’. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75 ρ at a temperature of ____________ °K?