Stoichiometry problems
- 1. __________ chart is a graph related to Antonie equation.
Options- A. Ostwald
- B. Cox
- C. Mollier's
- D. Enthalpy-concentration Discuss
Correct Answer: Cox
- 2. The most convenient way of expressing solution concentration is in terms of
Options- A. mole fraction
- B. normality
- C. molality
- D. molarity Discuss
Correct Answer: molarity
- 3. The heat capacity of a substance is
Options- A. greater for liquid state than for solid state.
- B. lower for liquid state than for gaseous state.
- C. higher for solid state than for liquid state.
- D. equal for solid and liquid states below melting point. Discuss
Correct Answer: greater for liquid state than for solid state.
- 4. Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20°C is 17.5 mm Hg.
Options- A. 80.38
- B. 80
- C. 79.62
- D. 78.51 Discuss
Correct Answer: 79.62
- 5. A butane isomerisation process produces 70 kmole/hr of pure isobutane. 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
Options- A. 3 kmole/hr
- B. 4 kmole/hr
- C. 5 kmole/hr
- D. 6 kmole/hr Discuss
Correct Answer: 5 kmole/hr
- 6. Elements in a periodic table are arranged in order of their
Options- A. atomic number.
- B. mass number.
- C. atomic weight.
- D. metallic characteristics. Discuss
Correct Answer: atomic number.
- 7. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of
Options- A. mixing
- B. adsorption
- C. wetting
- D. complete wetting Discuss
Correct Answer: complete wetting
- 8. The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is
Options- A. termed as relative saturation.
- B. not a function of the composition of gas mixture.
- C. called percentage saturation.
- D. not a function of the nature of vapor. Discuss
Correct Answer: termed as relative saturation.
- 9. Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules
Options- A. do not lose energy on collision.
- B. are above the inversion temperature.
- C. do not exert attractive force on each other.
- D. do work equal to loss in kinetic energy. Discuss
Correct Answer: do not exert attractive force on each other.
- 10. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is __________ gm.
Options- A. 82
- B. 164
- C. 41
- D. 8.2 Discuss
Correct Answer: 82
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