chemical engineering stoichiometry MCQs – Page 8

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 Review each marked answer and report any item that may be outdated or unclear.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
141. A gas occupies a volume of 283 c.c at 10C. If it is heated to 20C at constant pressure, the new volume of the gas will be __________ c.c?
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A. 566

B. 283

C. 141.5

D. 293
142. Measurement of the amount of dry gas collected over water from volume of moist gas is based on the___________________?
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A. Charles law

B. Daltons law of partial pressures

C. Boyles law

D. Avogadros hypothesis

143. Internal energy of a substance comprises of the _____________ energy?
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A. Translational

B. Vibrational

C. All A., B. & C.

D. Rotational

144. Pure oxide refractories are generally monocrystalline in nature and are self bonded ______________ bricks are generally used as moderator in nuclear reactors?
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A. Thoria

B. Carborundum

C. Beryllia

D. Corundum

145. Dissolving a solute in a solvent does not change its________________?
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A. Specific heat

B. Vapour pressure

C. None of these

D. Viscosity

146. Heat of ____________ of a fuel is called its calorific value?
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A. Combustion

B. Vaporisation

C. Reaction

D. Formation

147. Cp equals Cv at________________?
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A. 0C

B. 0R

C. 0K

D. 0F

148. The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, ?H = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be _____________ kJ/kgmole?
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A. -1632.3

B. -2448.45

C. 816.15

D. 1632.3

149. Refractoriness/fusion points of Superduty refractories is _____________ C?
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A. > 2000

B. 1630-1670

C. > 1730

D. 1520-1630

150. Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of ________________?
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A. Corundum

B. Siliceous fireclay

C. Fireclay

D. Silicon carbide
151. The boiling points for pure water and pure toluene are 100C and 110.6C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is___________________?
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A. 110.6C

B. Less than 100C

C. Between 100 and 110C

D. 100C

152. 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__________________?
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A. (C2H4)2H2.OH

B. C2H33OH

C. C3H21OH

D. C4H9OH
153. 1 kg/m2 is equal to ______________ mm water column?
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A. 100

B. 1000

C. 1

D. 10

154. Which of the following is not a unit of pressure ?
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A. Parsec

B. Ata, bar or Pascal

C. Torr

D. m2
155. With increase in the porosity, thermal spalling resistance of fireclay brick_______________?
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A. Remain same

B. May increase or decrease

C. Increases

D. Decreases

156. The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg ?
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A. 0.6

B. 0.1

C. 0.2

D. 0.4

157. Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called_________________?
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A. Spalling resistance

B. Refractoriness

C. None of these

D. Refractoriness under load (RUL)

158. Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of ______________ C?
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A. 770

B. 570

C. 70

D. 270
159. With rise in temperature, the heat capacity of a substance___________________?
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A. Remains unchanged

B. Decreases

C. Increases

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

160. The average translational kinetic energy with which a gas molecule is endowed is dependent on its__________________?
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A. Size

B. All A., B. & C.

C. Nature

D. Absolute temperature