Sodium chloride content in sea water is about _______________ gms/liter?
A. 2
B. 10
C. 25
D. 50
Month: February 2019
The temperature in the calcium carbide furnace is _______________ °C ?
The temperature in the calcium carbide furnace is _______________ °C ?
A. 200-300
B. 700-850
C. 2000-2200
D. 4000-4500
Highly porous refractory bricks are ____________________?
Highly porous refractory bricks are ____________________?
A. Less susceptible to chemical attack by molten fluxes and gases etc
B. Very strong
C. Having very high thermal conductivity
D. None of these
Low purity oxygen is used for____________________?
Low purity oxygen is used for____________________?
A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes
Anion exchanger is regenerated usually with ____________________?
Anion exchanger is regenerated usually with ____________________?
A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution
Nylon-66 is manufactured from____________________?
Nylon-66 is manufactured from____________________?
A. Hexamethylene diamine and adipic acid
B. Hexamethylene diamine and Maleic anhydride
C. Caprolactam
D. Dimethyl terephthalate and ethylene glycol
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
A. Na2CO3
B. NaHCO3
C. H2
D. None of these
Fermentation of molasses to produce ethyl alcohol is done at ________________ °C?
Fermentation of molasses to produce ethyl alcohol is done at ________________ °C?
A. 20 – 30
B. < – 5
C. 100 – 150
D. 250 – 300
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as ____________________ oil?
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as ____________________ oil?
A. Drying
B. Semi-drying
C. Non-drying
D. None of these
Which of the following is used as a coagulant in water treatment ?
Which of the following is used as a coagulant in water treatment ?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide