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
Related Mcqs:
- 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 - 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 - 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 - 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 - Solvay process as compared to dual process (i.e. modified Solvay process) ?
A. Can use low grade brine
B. Has less corrosion problems
C. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
D. Both B. and C. - During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to__________________?
A. Increase the rate of absorption
B. Avoid corrosion
C. Reduce the cooling water circulation rate
D. None of these - Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?
A. Nitric acid
B. Sulphuric acid
C. Ammonium sulphate
D. Hydrochloric acid - ______________ process is used for the manufacture of sodium carbonate by ammonia soda process?
A. Ostwald’s
B. Bosch
C. Solvay
D. Haber’s - Comparing sulphate process with sulphite process, we find that ______________ in the later ?
A. Both temperature & pressure in the former is less than that
B. Both temperature & pressure in the former is more than that
C. Temperature is more in the former whereas pressure is more
D. Pressure is more in the former whereas temperature is less - Le-Blanc process is a primitive process for the manufacture of___________________?
A. Caustic soda
B. Soda ash
C. Bromine from sea water
D. Hydrochloric acid
