Moisture, ash, sulphur & volatile matter
Moisture & volatile matter
Moisture, sulphur, nitrogen & fixed carbon
None of these
✅ The correct answer is option B.
Chemical Process MCQs
Deaeration of water in its treatment is necessary, as it
Minimises its turbidity
Helps in controlling its taste and odour
Minimises its corrosiveness
None of these
✅ The correct answer is option C.
Concentration of sulphide ores is done usually by
Roasting
Smelting
Froth floatation
Electro magnetic separation
✅ The correct answer is option C.
Which of the following is an explosive?
Nitroglycerene
Trintrotoluene (TNT)
Cellulose nitrate
All of the above
✅ The correct answer is option D.
Flux addition during smelting of ore is done to
Remove impurities/gangue
Enhance rate of reaction
Accelerate reduction of ore
Separate slag from metal
✅ The correct answer is option A.
Cation exchanger is regenerated usually with
NaOH
H₂SO₄
Hydrazine
Alum solution
✅ The correct answer is option B.
The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is
Alumina
Silica gel
Platinum
Nickel
✅ The correct answer is option A.
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
Na₂CO₃
NaHCO₃
H₂
None of these
✅ The correct answer is option C.
Styrene (a monomer for the production of polystyrene) is commercially produced by
Catalytic dehydrogenation of ethyl benzene
Dehydration of ethyl alcohol followed by hydrogenation
Reacting ethylene oxide with acetal-dehyde
Fermentation of starch
✅ The correct answer is option A.
Saponification number of an oil or fat
Gives an idea about its molecular weight
Is inversely proportional to its molecular weight
Detects its adulteration
All of the above
✅ The correct answer is option D.