Stoichiometry problems
- 1. pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be
Options- A. 0
- B. 10
- C. 7
- D. 14 Discuss
Correct Answer: 7
- 2. If 1 Nm3 of O2 contains 'N' number of molecules, then number of molecules in 2Nm3 of SO2 will be
Options- A. N
- B. N/2
- C. 2N
- D. 4N Discuss
Correct Answer: 2N
- 3. The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the
Options- A. relative humidity.
- B. relative saturation.
- C. percentage saturation.
- D. none of these. Discuss
Correct Answer: percentage saturation.
- 4. 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.
Options- A. potential energy
- B. intermolecular forces
- C. kinetic energy
- D. total energy Discuss
Correct Answer: kinetic energy
- 5. For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
Options- A. sodium chloride
- B. sodium carbonate monohydrate
- C. anhydrous sodium sulphate
- D. hypo Discuss
Correct Answer: sodium chloride
- 6. With increase in temperature, the surface tension of water
Options- A. increases
- B. decreases
- C. remains constant
- D. increases linearly Discuss
Correct Answer: decreases
- 7. The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.
Options- A. limiting
- B. real
- C. saturated
- D. normal Discuss
Correct Answer: saturated
- 8. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pvB and pvw respectively. The partial pressure of benzene in air-vapour mixture is
Options- A. PvB
- B. xB.PvB
- C. (Patm - Pvw)xB
- D. xB.Patm Discuss
Correct Answer: xB.PvB
- 9. The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be
Options- A. 10%
- B. 5%
- C. 18.18%
- D. 20% Discuss
Correct Answer: 20%
- 10. Degrees of freedom will be equal to the number of components for a system comprising of
Options- A. only soluble liquid components.
- B. partially miscible two liquid components system having two phases.
- C. two liquid components and one solute (soluble in both the liquids).
- D. none of these. Discuss
Correct Answer: only soluble liquid components.
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