Stoichiometry Objective Questions & Answers - ObjectiveBooks

Stoichiometry Objective Questions & Answers

Practice Test: Question Set - 26

1. Sodium _________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.
    (A) Carbonate (monohydrate)
    (B) Chloride
    (C) Thiosulphate
    (D) Bisulphite

2. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ________ gm.
    (A) 82
    (B) 164
    (C) 41
    (D) 8.2

3. The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is ________ kg mole.
    (A) 1
    (B) 0
    (C) 16
    (D) 44

4. At a temperature of 0°K, the molecules of a gas have only ________ energy.
    (A) Rotational
    (B) Vibrational
    (C) Translational
    (D) None of these

5. According to the kinetic theory, the thermal conductivity of a monatomic gas is proportional to
    (A) T
    (B) T0.5
    (C) T1.5
    (D) T2

6. Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is
    (A) 20
    (B) 32.2
    (C) 45.35
    (D) 58.65

7. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
    (A) Temperature
    (B) Nature of solute
    (C) Pressure
    (D) Nature of solvent

8. The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal ________ in the two phases.
    (A) Potential energy
    (B) Intermolecular forces
    (C) Kinetic energy
    (D) Total energy

9. Volume occupied by one gm mole of a gas at S.T.P. is
    (A) 22.4 liters
    (B) 22400 liters
    (C) 22.4 c.c
    (D) 359 liters

10. A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be
    (A) 3 kmole/hr
    (B) 4 kmole/hr
    (C) 5 kmole/hr
    (D) 6 kmole/hr

11. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is
    (A) 180
    (B) 60.3
    (C) 720
    (D) 200

12. 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. If the average specific heat of all the gases/vapor is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to
    (A) 1225
    (B) 1335
    (C) 1525
    (D) 1735

13. The vapor pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapor pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately
    (A) 0.07
    (B) 0.09
    (C) 0.11
    (D) 0.13

14. The most convenient way of expressing solution concentration is in terms of
    (A) Mole fraction
    (B) Normality
    (C) Molality
    (D) Molarity

15. Disappearance of snow in subzero weather exemplifies the process of
    (A) Evaporation
    (B) Sublimation
    (C) Vaporization
    (D) Melting

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