A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution
Related Mcqs:
- Cation exchanger is regenerated usually with_________________________?
A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution - 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_____________________?
A. Calcium sulphate
B. Sodium chloride
C. Sodium sulphate
D. Magnesium chloride - Zeolite used in water softening process (cation exchange) is regenerated by washing with___________________?
A. Brine
B. Chloramines
C. Sodium bisulphite
D. Liquid chlorines - Flexible foam (for mattresses) is usually made of_____________________?
A. PVC
B. Silicone
C. Polyurethanes
D. Polyamides - Which glass is usually used in optical work ?
A. Lead glass
B. High silica (borosilicate) glass
C. Photo-sensitive glass
D. Fibre glass - Essential oils are usually obtained using__________________?
A. Steam distillation
B. Extractive distillation
C. Solvent extraction
D. Leaching - Concentration of sulphide ores is done usually by____________________?
A. Roasting
B. Smelting
C. Froth floatation
D. Electromagnetic separation - Finely ground calcium aluminate & silicate is a/an ____________________?
A. Cermet
B. Cement
C. Abrasive
D. Explosive - Hydrogenation of oil takes place in a/an ____________________ reactor ?
A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these - Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
A. Reduction
B. Roasting
C. Calcination
D. Smelting
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