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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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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.

All Topics  9594

Heat of neutralisation of HCl and NaOH is – 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole?
A 57.46
B -57.46
C 114.92
D -28.73
Correct Answer: 57.46
Which of the following is followed by an ideal solution ?
A Boyle’s law
B Amagat’s law
C Raoult’s law
D Trouton’s rule
Correct Answer: Raoult’s law
The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?
A -109.5
B +109.5
C +180
D +100
Correct Answer: -109.5
Pick out the wrong statement?
A Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve
B At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite
C Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture
D Clapeyron equation is given by dP/dT = (λ/T) (VG – VL); where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG and VL = volumes of gas and liquid respectively
Correct Answer: Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture
Pick out the wrong statement?
A To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg
B 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25
C A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps. If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to Ps/Pg
D A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility .of the solute is C1. The output rate of solids from an efficient crystalliser is (C + C1) V
Correct Answer: A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility .of the solute is C1. The output rate of solids from an efficient crystalliser is (C + C1) V
Pick out the wrong statement?
A Ten times dilution of a normal solution (N) reduces its normality to N/10
B When equal weights of oxygen and methane are mixed in an empty reactor at room
C Volume occupied by 9.034 x 1023 atoms of oxygen in ozone (O3) at NTP will be 11200 c.c
D One kg mole of an ideal gas at N.T.P occupies 22400 Nm3
Correct Answer: One kg mole of an ideal gas at N.T.P occupies 22400 Nm3
Pick out the wrong unit conversion of calorific value?
A 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg
B 1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3
C 1 BTU/lb = 2.3 kcal/kg
D 1 kcal/m3 = 0.1124 BTU/ft3
Correct Answer: 1 BTU/lb = 2.3 kcal/kg
Pick out the wrong statement ?
A ‘Reduced temperature’ of a substance is the ratio of its existing temperature to its critical temperature, both expressed on Celsius scale
B ‘Reduced pressure’ is the ratio of the existing pressure of a substance to its critical pressure
C ‘Reduced volume’ is the ratio of the existing molal volume of a substance to its critical molal volume
D None of these
Correct Answer: ‘Reduced temperature’ of a substance is the ratio of its existing temperature to its critical temperature, both expressed on Celsius scale
Pick out the wrong statement?
A Heat capacity of a diatomic gas is higher than that of a monatomic gas
B Equal volumes of Argon and Krypton contain equal number of atoms
C Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 1023
D The binary mixture of a particular composition in both vapor and liquid state is known as an azeotropic mixture
Correct Answer: Equal volumes of Argon and Krypton contain equal number of atoms
Pick out the wrong statement?
A A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure
B A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a ‘superheated vapor’
C The temperature at which a vapor is saturated is termed as the boiling point
D The difference between the existing temperature of a vapor and its saturation temperature (i.e.dew point) is called its ‘degree of superheat’
Correct Answer: The temperature at which a vapor is saturated is termed as the boiling point
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