Stoichiometry Objective Questions and Answers

204. Viscosity of atmospheric air may be about __________ centipoise.

205. Heat of __________ of a fuel is called its calorific value.

A. Formation

206. The chemical nature of an element is independent of

A. Its atomic number

B. The number of protons or electrons present in it

C. The number of neutrons present in it

D. None of these

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207. A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO₂, 0.05 gm mole of oxygen and 0.80 gm mole of N₂. What is its molecular weight?

208. The pressure of 'V' litres of a dry gas is increased from 1 to 2 kgf/cm² at a constant temperature. The new volume will become

A. $$\frac{{\text{V}}}{2}$$

B. 2V

C. $$\frac{{\text{V}}}{4}$$

D. V²

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209. Isotopes are atoms having the same

A. Mass number

B. Number of neutrons

C. Atomic mass

D. None of these

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210. 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

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Chemical Engineering Objective Questions { Stoichiometry }