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- Question
Pick out the wrong unit conversion of heat transfer co-efficient.
Options- A. 1 kcal/m2.hr.°C = 0.2048 BTU/ft2.hr. °F. = 1.163 W/m2.°K
- B. 1 kcal/m2.hr.°K = 1.163 W/m2.°C
- C. 1 W/m2 . °C = 0.1761 BTU/ft2.hr.°F.
- D. 1 BTU/ft2.hr.°F = 4.88 kcal/m2.hr.°C = 20.44 kJ/m2.hr°C = 5.678 W/m2.°C.
- Correct Answer
- 1 kcal/m2.hr.°K = 1.163 W/m2.°C
- 1. Addition of a non-volatile solute to a solvent produces a __________ in its solvent.
Options- A. freezing point elevation
- B. boiling point depression
- C. vapor pressure lowering
- D. all (a), (b) & (c) Discuss
- 2. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
Options- A. doubled.
- B. halved.
- C. trebled.
- D. unpredictable. Discuss
- 3. Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume 'X' diffuses twice as fast as another perfume 'Y'; what is the molecular weight of 'Y', if the vapor density of gas 'X' is 2? Molecular weight of gas 'X' is to be assumed to be 2.
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
- 4. Pick out the wrong unit conversion of mass transfer co-efficient.
Options- A. 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar
- B. 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar
- C. 1 lb/hr . ft2 = 4.8823 kg/hr . m2
- D. 1 kg/hr . m2 = 4.8823 lb/hr . ft2 Discuss
- 5. Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ?H = heat of mixing, and ?V = volume change on mixing )?
Options- A. ?H = 1 (+ ve)and ? V = -ve
- B. ?H = 0
- C. ?V = 0
- D. both (b) and (c) Discuss
- 6. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The amount of water vapour condensed (in kg) is
Options- A. 0.0
- B. 0.065
- C. 0.1
- D. 1.0 Discuss
- 7. For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become
Options- A. P/3
- B. 3P
- C. 9P2
- D. 9P Discuss
- 8. __________ kg of CaC03 on heating will give 56 kg of CaO.
Options- A. 56 .
- B. 100
- C. 144
- D. 1000 Discuss
- 9. Kopp's rule is helpful in finding the
Options- A. heat capacities of solids.
- B. heat capacities of gases.
- C. molal heat capacities of gases.
- D. activation energy. Discuss
- 10. Cp is expressed in S.I. unit as
Options- A. J/kg.°K
- B. 0°K
- C. W/m2. °C
- D. W/m. °K Discuss
Stoichiometry problems
Search Results
Correct Answer: vapor pressure lowering
Correct Answer: unpredictable.
Correct Answer: 16
Correct Answer: 1 kg/hr . m2 = 4.8823 lb/hr . ft2
Correct Answer: both (b) and (c)
Correct Answer: 0.065
Correct Answer: P/3
Correct Answer: 100
Correct Answer: heat capacities of solids.
Correct Answer: J/kg.°K
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