Nickel
Zinc oxide
Alumina
Thorium oxide
✅ The correct answer is option A.
Engineering
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3522. Out of the following, N₂ content is minimum in
Urea
Ammonium nitrate
Ammonium sulphate
Ammonium chloride
✅ The correct answer is option C.
3523. In the manufacture of urea, the intermediate chemical formed is
Biuret
Ammonium carbamate
Ammonium carbonate
None of these
✅ The correct answer is option B.
3524. The calorific value of ‘LPG’ (50% propane + 50% butane) is about __________ kcal/Nm³.
5000
25, 000
10, 000
15, 000
✅ The correct answer is option B.
3525. Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
Steam reforming of naphtha and cracking of natural gas
Electrolysis of water
Cryogenic separation of hydrogen from coke oven gas
All of the above
✅ The correct answer is option D.
3526. In calcium ammonium nitrate (CAN) fertil-ser
Nitrate nitrogen is quick acting
Ammoniacal nitrogen is quick acting
Nitrate nitrogen is slower acting
None of these
✅ The correct answer is option A.
3527. Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃
HNO₃ & limestone
CO₂ & H₂SO₄
HNO₃ & NH₄Cl
CO₂ & KNO₃
✅ The correct answer is option A.
3528. ‘Wobbe index’ is a characteristic of
Solid fuels
Gaseous fuels
Liquid fuels
Fat coals
✅ The correct answer is option B.
3529. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
Mixed
Complex
Highly hygroscopic
Highly explosive
✅ The correct answer is option B.
3530. P₂O₅ percentage in the phosphoric acid produced by wet process is about
10
30
50
70
✅ The correct answer is option B.