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- Question
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
Options- A. poor oxidation stability and high gum forming tendency.
- B. greater tendency of decomposition at elevated temperature.
- C. hydrolysis tendency in presence of water.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 1. Raw materials used for producing __________ cement does not contain iron oxide.
Options- A. waterproof
- B. slag
- C. white
- D. pozzolan Discuss
- 2. Very fine suspended and colloidal impurities are removed from water by a process called
Options- A. sedimentation
- B. coagulation
- C. disinfection
- D. softening Discuss
- 3. Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
Options- A. calcium sulphate
- B. sodium chloride
- C. sodium sulphate
- D. magnesium chloride. Discuss
- 4. The drug used in contraceptives is
Options- A. sulphadizene
- B. mestranol
- C. methyl salicylate
- D. pencillin Discuss
- 5. The combustion reaction, C + O2 = CO2, is
Options- A. exothermic
- B. endothermic
- C. autocatalytic
- D. none of these Discuss
- 6. Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
Options- A. callagen
- B. tannin
- C. molasses
- D. carbohydrate Discuss
- 7. Polycaprolactum is commercially known as
Options- A. nylon-6
- B. nylon-66
- C. dacron
- D. rayon Discuss
- 8. Claude process of gas liquefaction employs
Options- 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. Discuss
- 9. Pasteurisation of milk means
Options- A. removal of fatty and albuminous substance from it.
- B. killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
- C. inhibiting the growth of micro-organisms without killing them.
- D. none of these. Discuss
- 10. Esterification reaction
Options- A. produces soap.
- B. is reversible.
- C. is a reaction between an alcohol and an organic acid.
- D. all (a), (b) and (c). Discuss
Chemical Process problems
Search Results
Correct Answer: white
Correct Answer: coagulation
Correct Answer: sodium chloride
Correct Answer: mestranol
Correct Answer: exothermic
Correct Answer: callagen
Correct Answer: nylon-6
Correct Answer: adiabatic expansion against a piston or in a turbine.
Correct Answer: killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
Correct Answer: all (a), (b) and (c).
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