3531. Ammonium sulphate can be produced by reacting gypsum with
Ammonia
Ammonium carbonate
Nitric acid
None of these
✅ The correct answer is option B.
Chemical Engineering
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3532. Phosphoric acid is produced in wet process from phosphate rock and
Dilute H₂SO₄
Concentrated H₂SO₄
Concentrated NHO₃
Concentrated HCl
✅ The correct answer is option A.
3533. Ammonium sulphate fertiliser is
The highest concentration nitrogenous fertiliser
The best fertiliser for paddy
A basic fertiliser
A neutral fertiliser
✅ The correct answer is option B.
3534. Gray King Assay and Swelling Index of a coal is a measure of its
Swelling characteristics
Abradability
Agglutinating properties
Resistance to impact breakage
✅ The correct answer is option A.
3535. Red phosphorous is changed into white phosphorous by
Heating in presence of light
Melting under pressure
Vaporisation followed by condensation
None of these
✅ The correct answer is option C.
3536. Both white phosphorous as well as red phosphorous
Are soluble in CS₂
Burns when heated in air
Reacts with hot caustic soda solution to give phosphine
All of the above
✅ The correct answer is option B.
3537. Reaction of __________ acid with phosphate rock produces superphosphates.
Hydrochloric
Sulphuric
Nitric
Phosphoric
✅ The correct answer is option B.
3538. Monte catini process is a widely used process for the manufacture of
Urea
Calcium ammonium nitrate
Triple superposphate
None of these
✅ The correct answer is option A.
3539. Volatile matter content of metallurgical coke may be around __________ percent.
1-Feb
Oct-15
22-26
30-33
✅ The correct answer is option A.
3540. Nitrolime is
Calcium nitrate
Calcium ammonium nitrate
A mixture of nitric acid and lime
A mixture of ammonium nitrate and calcium nitrate
✅ The correct answer is option B.