number of neutrons
mass number
electronic configuration
atomic weight
✅ The correct answer is option C.
Engineering
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3822. Yield of elemental phosphorous from rock phosphate is about __________ percent.
1-Feb
15-25
40-45
60-65
✅ The correct answer is option B.
3823. Gas based fertiliser plants use
Natural gas as a source of hydrogen
Natural gas as heating medium
Coal gas as a source of hydrogen
Coal gas as heating medium
✅ The correct answer is option A.
3824. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.
Catalytic
Exothermic
Endothermic
Reversible
✅ The correct answer is option B.
3825. Tricresyl phosphate is chemically represented as
(CH₃ C₆ H₄)₃ PO₄
Ca₁₀(PO₄)3F₆
(NH₄)₂HPO₄
NH₄H₂PO₄
✅ The correct answer is option A.
3826. A phosphatic fertiliser contains 16% P₂O₅. It could be
Dicalcium phosphate
Superphosphate
Triple superphosphate
None of these
✅ The correct answer is option B.
3827. Action of phosphoric acid on rock phosphate produces
Superphosphate
Triple superphosphate
Nitrophosphate
Diammonium phosphate
✅ The correct answer is option B.
3828. Reaction of dilute sulphuric acid with phosphate rock produces
Phosphoric acid
Superphosphate
Triple superphosphate
Gypsum
✅ The correct answer is option A.
3829. Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.
25-28
52-54
75-80
> 98
✅ The correct answer is option B.
3830. Calcium ammonium nitrate (CAN) is
A mixed fertiliser
A straight fertiliser
A complex fertiliser
Not a fertiliser ; it is an explosive
✅ The correct answer is option C.