Liquefaction of gases cannot be done by___________________?

Related Mcqs:

1. Favourable conditions for the liquefaction of gases in general are _____________________?

   A. High pressure & low temperature
   B. Low pressure & high temperature
   C. High pressure & high temperature
   D. Low pressure & low temperature

2. Linde process of gas liquefaction employs__________________?

   A. Exchange of heat with colder stream
   B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
   C. Adiabatic expansion against a piston or in a turbine
   D. Merely compressing the gas beyond its critical pressure

3. Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ?

   A. -83
   B. -183
   C. -196
   D. -218

4. Claude process of gas liquefaction employs___________________?

   A. Merely compression of gas beyond its critical pressure
   B. Joule-Thomson expansion cooling
   C. Heat exchange with colder stream
   D. Adiabatic expansion against a piston or in a turbine

5. Permanent hardness of water can be removed by___________________?

   A. Boiling
   B. Adding Ca(OH)2
   C. Boiling it with Na2CO3
   D. None of these

6. Which of the following fuel gases contains maximum amount of carbon monoxide ?

   A. Coke oven gas
   B. Water gas
   C. Blast furnace gas
   D. L.D. converter gas

7. H2S is scrubbed from refinery gases by absorption using ________________________?

   A. Dilute H2SO4
   B. Ethanol amine
   C. Chilled water
   D. Tri-butyl phosphate

8. Soap cannot be used with hard water, because _________________?

   A. Hard water contains sulphate
   B. They form insoluble calcium soaps which precipitate
   C. They attract back the removed dirt
   D. None of these

9. Ethyl alcohol cannot be produced_________________?

   A. From waste sulphite substrate of paper mills
   B. By Esterification and hydrolysis of ethylene
   C. From molasses
   D. None of these

10. Sulphur addition in soap is done to _____________________?

    A. Improve the soap texture
    B. Cure pimples & dandruff
    C. Fasten lather formation
    D. Increase its cleansing action