chemical engineering stoichiometry MCQs – Page 16

Practise multiple-choice questions from chemical engineering stoichiometry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering stoichiometry Mcqs

301. Which of the following is not a unit of kinematic viscosity ?
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A. None of these

B. Poise

C. Stoke

D. cm2/second

302. 1 Kcal/kg. C is equivalent to _______________ BTU/lb. F ?
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A. 4.97

B. None of these

C. 1

D. 2.42

303. In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?
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A. All A., B. & C.

B. Kg-mole of solute/kg-mole of solvent

C. Kg of solute/kg of solvent

D. Kg-mole of solute/1000 kg of solvent

304. If pH value of a solution is 8, then its pOH value will be ____________________?
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A. 10

B. 1

C. 7

D. 6

305. Hesss law of constant heat summation is based on conservation of mass. It deals with ___________________?
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A. Equilibrium constant

B. Reaction rate

C. None of these

D. Changes in heat of reaction

306. Solutions which distil without change in composition are called________________?
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A. Saturated

B. Supersaturated

C. Azeotropic

D. Ideal

307. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?
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A. 8.2

B. 164

C. 82

D. 41

308. The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is_____________________?
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A. Termed as relative saturation

B. Not a function of the composition of gas mixture

C. Not a function of the nature of vapor

D. Called percentage saturation

309. Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?
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A. Vapor to solid

B. One allotropic form to another allotropic form

C. Vapor to liquid

D. Solid to liquid

310. At a temperature of 0K, the molecules of a gas have only _______________ energy?
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A. None of these

B. Translational

C. Vibrational

D. Rotational

311. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________?
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A. Total pressure

B. Absolute humidity at a given temperature

C. Both A. and B.

D. Neither A. nor B.

312. In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?
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A. Increase

B. None of these

C. Remain unchanged

D. Decrease

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

B. Pressure

C. Molecularity

D. Volume

314. The vapour pressure of water is given by, in Psat = A (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50C is approximately__________________?
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A. 0.13

B. 0.09

C. 0.11

D. 0.07

315. Pick out the correct statement ?
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A. The heating of water in a beaker is an example of an isolated system

B. At equilibrium, ?G is zero

C. Heat of solution is always positive

D. For the reaction, PCl5 ? PCl3 + Cl2, ?G is less than ?E

316. pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?
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A. 14

B. 10

C. 0

D. 7

317. Pick out the wrong unit conversion of mass transfer co-efficient?
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A. 1 lb/hr.ft2 = 4.8823 kg/hr.m2

B. 1 kg/hr.m2 = 4.8823 lb/hr.ft2

C. 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar

D. 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar

318. Pick out the wrong unit conversion ?
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A. 1 kgf= 9.8 Newton

B. 1 Pascal second = 10 poise

C. 1 ppm = 1 ml/m3 = 1 mg/kg

D. 1 stoke = 1 m2/second

319. A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?
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A. 0.66

B. 0.16

C. 0.47

D. 0.33

320. Atomic ______________ of an element is a whole number?
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A. Radius

B. Number

C. Weight

D. Volume

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