Gun powder uses_____________________?
Gun powder uses_____________________?
A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All A , B, & C.
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Catalytic oxidation of naphthalene produces_______________?
Catalytic oxidation of naphthalene produces_______________?A. Styrene
B. Phenol
C. Phthalic anhydride
D. None of theseLinde process of gas liquefaction employs__________________?
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 pressureDichloro diphenyl ________________ is the full form of DDT (an insecticide) ?
Dichloro diphenyl ________________ is the full form of DDT (an insecticide) ?A. Tetrachloroethane
B. Trichloroethane
C. Tetrachloromethane
D. TrichloromethaneIn sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 – 180°C
D. 1 atm., 800°CWhich glass is usually used in optical work ?
Which glass is usually used in optical work ?A. Lead glass
B. High silica (borosilicate) glass
C. Photo-sensitive glass
D. Fibre glassChemical formula of ‘salt cake’ is____________________?
Chemical formula of ‘salt cake’ is____________________?A. Na2SO4
B. CaSO4
C. MgSO4
D. BaSO4