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- Question
The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.
Options- A. increases
- B. decreases
- C. remains unchanged
- D. either (a) or (b); depends on the liquid
- Correct Answer
- decreases
- 1. N.T.P. corresponds to
Options- A. 1 atm.absolute pressure& 0°C.
- B. 760 mm Hg gauge pressure & 0°C.
- C. 760 torr & 15°C.
- D. 101.325 KPa gauge pressure & 0°C. Discuss
- 2. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies
Options- A. 0 < Xw < 0.5
- B. Xw = 0.5
- C. 0.5 < Xw < 1.0
- D. Xw = 1.0 Discuss
- 3. The temperature at which the second Virial co-efficient of a real gas is zero is called the
Options- A. eutectic point
- B. Boyle temperature
- C. boiling point
- D. critical temperature Discuss
- 4. 40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
Options- A. 1/2
- B. 1/3
- C. 1/4
- D. 2/3 Discuss
- 5. The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.
Options- A. increases
- B. decreases
- C. remains unchanged
- D. increases linearly Discuss
- 6. For a reacation, X ? Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 7. The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of
Options- A. normal condensation.
- B. wetting.
- C. sum of (a) and (b).
- D. difference of (a) and (b). Discuss
- 8. 1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?
Options- A. 5
- B. 10
- C. 15
- D. 20 Discuss
- 9. Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
Options- A. ?
- B. 0
- C. 1
- D. 0.24 Discuss
- 10. At standard conditions,
N2 + 2O2 ⇌ 2NO2; ?G° = 100 kJ/mole
NO +
O2 ⇌ 2NO2; ?G° = -35 kJ/mole
The standard free energy of formation of NO in kJ/mole is
Options- A. 15
- B. 30
- C. 85
- D. 170 Discuss
Stoichiometry problems
Search Results
Correct Answer: 1 atm.absolute pressure& 0°C.
Correct Answer: 0.5 < Xw < 1.0
Correct Answer: eutectic point
Correct Answer: 1/3
Correct Answer: decreases
Correct Answer: 2
Correct Answer: sum of (a) and (b).
Correct Answer: 10
Correct Answer: 1
Correct Answer: 85
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