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- Question
The value of the gas-law constant 'R' is 1.987
Options- A. kcal/kg-mole.°C
- B. Btu/lb-mole.°R
- C. kcal/kg-mole.°K
- D. both (b)& (c)
- Correct Answer
- both (b)& (c)
- 1. A vapor that exists above its critical temperature is termed as a __________ vapor.
Options- A. saturated
- B. unsaturated
- C. gaseous
- D. sub-cooled Discuss
- 2. One micron is equal to __________ cm.
Options- A. 10-2
- B. 10-4
- C. 10-6
- D. 10-8 Discuss
- 3. 1 kg/m2 is equal to __________ mm water column.
Options- A. 1
- B. 10
- C. 100
- D. 1000 Discuss
- 4. Concentration of a solution expressed in terms of __________ is independent of temperature.
Options- A. molarity
- B. normality
- C. molality
- D. none of these Discuss
- 5. Osmotic pressure of the solution can be increased by
Options- A. decreasing its temperature.
- B. increasing the volume of the vessel containing the solution.
- C. diluting the solution.
- D. none of these. Discuss
- 6. Recycling in a chemical process facilitates
Options- A. increased yield
- B. enrichment of product
- C. heat conservation
- D. all (a), (b) &(c) Discuss
- 7. The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
Options- A. less
- B. more
- C. same
- D. either (a) or (b); depends on the nature of the substance Discuss
- 8. For a neutral solution (pH = 7), the value of[H+] [OH-] is equal to
Options- A. 0
- B. 1
- C. < 1
- D. > 1 Discuss
- 9. The value of Trouton's ratio (?b/Tb) for a number of substances is 21 (where, ?b = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.
Options- A. polar
- B. non-polar
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 10. The combustion equations of carbon and carbon monoxide are as follows:
C + O2 = CO2, ?H = - 394 kJ/kg . mole CO + 1/2 O2 = CO2, ?H = - 284.5 kJ/kg. mole.
The heat of formation of CO is __________ kJ/kg. mole.
Options- A. -109.5
- B. +109.5
- C. +180
- D. +100 Discuss
Stoichiometry problems
Search Results
Correct Answer: gaseous
Correct Answer: 10-4
Correct Answer: 1
Correct Answer: molality
Correct Answer: none of these.
Correct Answer: all (a), (b) &(c)
Correct Answer: same
Correct Answer: 1
Correct Answer: both (a) & (b)
Correct Answer: -109.5
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