# Home / Chemical Engineering / Stoichiometry :: Section 2

### Chemical Engineering :: Stoichiometry

1. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

2.  A. 0.19 B. 0.33 C. 0.40 D. 0.67   3. Volume percent for gases is equal to the

4.  A. weight percent. B. mole percent. C. weight percent only for ideal gases. D. mole percent only for ideal gases.   5. Cp equals Cv at

6.  A. 0°C B. 0°K C. 0°F D. 0°R   7. Pick out the wrong statement.

8.  A. The evaporation of aqueous solution of glucose causes its molarity to increase. B. Both the freezing point as well as boiling point of sea water is more than that of distilled water. C. The solution containing equal masses of two liquids 'X' and 'Y' has the same mole fraction of' 'X' and 'Y'. D. both (b) and (c)   9. The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.

10.  A. increases B. decreases C. remains unchanged D. either (a) or (b); depends on the liquid   11. The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.

12.  A. increases B. decreases C. remains unchanged D. increases linearly   13. Mass number of an atom is the sum of the numbers of

14.  A. neutrons and protons B. protons and electrons C. neutrons and electrons D. both(a)&(b)   15. Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.

16.  A. compressibility B. molecular weight C. humidity D. none of these   17. Colligative properties of a dilute solution are those, which depend entirely upon the

18.  A. chemical composition of the solute. B. constitution of the solute. C. number of solute molecules contained in a given volume of the solvent. D. none of these.   19. Viscosity of atmospheric air may be about __________ centipoise.

20.  A. 0.015 B. 1.5 C. 15 D. 150   