Stoichiometry problems
- 1. The depression in freezing point of a solution is
Options- A. inversely proportional to the mass of solvent.
- B. directly proportional to the mole of solute.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
Correct Answer: both (a) and (b).
- 2. 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.
Options- A. 1
- B. 0
- C. 16
- D. 44 Discuss
Correct Answer: 0
- 3. 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?
Options- A. 28.6
- B. 30.0
- C. 30.6
- D. 32.6 Discuss
Correct Answer: 30.6
- 4. Volume occupied by one gm mole of a gas at S.T.P. is
Options- A. 22.4 litres
- B. 22400 litres
- C. 22.4 c.c
- D. 359 litres Discuss
Correct Answer: 22.4 litres
- 5. A sugar solution containing __________ percent sugar is equivalent to 1 Brix.
Options- A. 0.01
- B. 0.1
- C. 1
- D. 10 Discuss
Correct Answer: 1
- 6. Pick out the wrong unit conversion.
Options- A. l kgf= 9.8 Newton.
- B. 1 stoke = 1 m2/second.
- C. 1 Pascal second = 10 poise.
- D. 1 ppm = 1 ml/m3 = 1 mg/kg. Discuss
Correct Answer: 1 stoke = 1 m2/second.
- 7. A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
Options- A. 1.25
- B. 1.3
- C. 1.35
- D. 1.2 Discuss
Correct Answer: 1.2
- 8. Normality of a solution does not change with the increase in the
Options- A. pressure
- B. temperature
- C. solute concentration
- D. dilution of the solution Discuss
Correct Answer: pressure
- 9. Pick out the correct statement.
Options- A. Heat of solution is always positive.
- B. At equilibrium, ?G is zero.
- C. For the reaction, PCl5⇌PCl3 + Cl2, ?G is less than ?E
- D. The heating of water in a beaker is an example of an isolated system. Discuss
Correct Answer: At equilibrium, ?G is zero.
- 10. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
Options- A. collide without loss of energy.
- B. do work equal to loss in kinetic energy.
- C. are above the inversion temperature.
- D. exert no attractive force on each other. Discuss
Correct Answer: are above the inversion temperature.
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