A. -83
B. -183
C. -196
D. -218
Related Mcqs:
- Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about _____________ °C ?
A. -53
B. -103
C. -183
D. -196 - 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 - 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 - 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 - Liquefaction of gases cannot be done by___________________?
A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Merely compressing it beyond critical pressure
D. Adiabatic expansion against a piston or in a turbine - Oxygen is produced by fractionation of air using _____________ process?
A. Linde’s
B. Claude’s
C. Either A. or B.
D. None of these - Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is___________________?
A. 0.14
B. 0.34
C. 0.94
D. 1.4 - Penicillin is separated from fermented broth by ____________________?
A. Extraction with amyl or butyl acetate
B. Ternary Azeotropic distillation
C. Evaporator in calandria
D. Extractive distillation - Which of the following is not a product of coal tar distillation ?
A. Anthracene
B. Creosote oil
C. Carbolic oil
D. None of these - Low purity oxygen is used for____________________?
A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes
