Stoichiometry problems
- 1. Kinetic theory of gases stipulates that, the
Options- A. energy is lost during molecular collisions.
- B. molecules possess appreciable volume.
- C. absolute temperature is a measure of the kinetic energy of molecules.
- D. none of these. Discuss
Correct Answer: absolute temperature is a measure of the kinetic energy of molecules.
- 2. For an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).
Options- A. inversely
- B. exponentially
- C. linearly
- D. negligibly Discuss
Correct Answer: linearly
- 3. The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation
Options- A. increases with pressure rise.
- B. decreases with increasing pressure.
- C. becomes zero at the critical point.
- D. both (b) & (c). Discuss
Correct Answer: both (b) & (c).
- 4. Solutions having the same osmotic pressure are called __________ solutions.
Options- A. dilute
- B. ideal
- C. isotonic
- D. saturated Discuss
Correct Answer: isotonic
- 5. An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the
Options- A. Kistyakowsky equation
- B. Antonic equation
- C. Kopp's rule
- D. Trouton's rule Discuss
Correct Answer: Antonic equation
- 6. Heat of transition is the heat evolved or absorbed, when a substance is converted from
Options- A. vapor to liquid.
- B. vapor to solid.
- C. solid to liquid.
- D. one allotropic form to another allotropic form. Discuss
Correct Answer: one allotropic form to another allotropic form.
- 7. Weight of 56 litres of ammonia at N.T.P. is __________ gm.
Options- A. 2.5
- B. 42.5
- C. 56
- D. 2800 Discuss
Correct Answer: 42.5
- 8. A solution with reasonably permanent pH is called a/an __________ solution.
Options- A. ideal
- B. non-ideal
- C. buffer
- D. colloidal Discuss
Correct Answer: buffer
- 9. Measurement of the amount of dry gas collected over water from volume of moist gas is based on the
Options- A. Charle's law.
- B. Dalton's law of partial pressures.
- C. Avogadro's hypothesis.
- D. Boyle's law. Discuss
Correct Answer: Dalton's law of partial pressures.
- 10. Colligative properties of a dilute solution are those which depend entirely upon the
Options- A. constitution of the solute.
- B. chemical composition of the solute.
- C. number of solute molecules contained in a given volume of the solvent.
- D. none of these. Discuss
Correct Answer: constitution of the solute.
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