chemical engineering stoichiometry MCQs – Page 11

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 Review each marked answer and report any item that may be outdated or unclear.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

201. Carborundum used for making crucibles for melting non-ferrous metals is chemically________________?
0

A. Zirconium sulphate

B. Silicon nitride

C. Silicon carbide

D. Crystalline magnesia

202. Pick out the wrong statement?
0

A. Graphite refractories are also called plumbago refractories

B. Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28

C. Insulating refractories used in place of regular refractory bricks are usually called light weight refractories, and they have similar composition as heavy bricks

D. Calcined magnesite is also called dead burnt magnesite

203. The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 __________?
0

A. 1023

B. 1026

C. 1019

D. 1020

204. Osmotic pressure of the solution can be increased by_________________?
0

A. Diluting the solution

B. Increasing the volume of the vessel containing the solution

C. None of these

D. Decreasing its temperature

205. For any system, the _____________ heat of solution is dependent on the temperature and the adsorbate concentration?
0

A. Integral

B. Differential

C. Both A. & B.

D. Neither A. nor B.

206. Lower wall courses of soaking pits are made of _____________ bricks to avoid the action of molten slag & scale?
0

A. Silica

B. Silicon carbide

C. Low duty fireclay

D. Chrome or magnesite

207. Mass number of an atom is the sum of the numbers of_________________?
0

A. Neutrons and protons

B. Protons and electrons

C. Neutrons and electrons

D. Both A. & B.

208. A gas at 0C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be_______________?
0

A. 0K

B. -136.5C

C. -273C

D. 136.5K

209. Cp Cv for an ideal gas is equal to________________?
0

A. R/2

B. 2R

C. 3R

D. R

210. Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the________________?
0

A. All A., B. & C.

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

C. Vapor follows the ideal gas law

D. Volume in the liquid state is negligible compared with that in the vapor state

211. Pick out the wrong unit conversion of temperature?
0

A. F = (C + 17.778) 1.8

B. R = 273 + F

C. Temperature difference of 1K = 1C = 9/5F

D. C = (F- 32) 0.555

212. The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the_______________?
0

A. Nature of both the gas & the liquid

B. Temperature

C. Total pressure

D. None of these

213. Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume X diffuses twice as fast as another perfume Y; what is the molecular weight of Y, if the vapor density of gas X is 2? Molecular weight of gas X is to be assumed to be 2 ?
0

A. 2

B. 4

C. 8

D. 16

214. Fireclay bricks are not used in the________________?
0

A. Beehive coke oven

B. By-product coke oven walls

C. Coke oven regenerators

D. Combustion chamber of B.F. stoves

215. The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to________________?
0

A. 150

B. 15

C. 1500

D. 1.5

216. 1 kg/cm2 is equal to________________?
0

A. 1 KPa

B. 10 metres of water column

C. 1 metre of water column

D. 760 torr

217. A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be _____________ kgf/cm2 ?
0

A. 4

B. 2

C. 8

D. 1

218. Pick out the wrong conversion formula for the conversion of weight units ?
0

A. 1 tonne = 1000 kg = 22.046 lbs

B. 1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons

C. 1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton

D. None of these

219. Pick out the wrong statement?
0

A. perature, then the fraction of total pressure exerted by the oxygen is 1/2

B. When equal weights of oxygen and methane are mixed in an empty reactor at room

C. One kg mole of an ideal gas at N.T.P occupies 22400 Nm3

D. Ten times dilution of a normal solution (N) reduces its normality to N/10

E. Volume occupied by 9.034 x 1023 atoms of oxygen in ozone (O3) at NTP will be 11200 c.c

220. Giga stands for__________________?
0

A. 12-Oct

B. 1012

C. 1015

D. 109

Showing 201 to 220 of 398 mcqs