Fertiliser Technology
Nitric acid is produced on commercial scale in a fertiliser plant by

Oxidation of ammonia
None of these
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc

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Fertiliser Technology
Potassic fertilisers

Stimulate early growth and accelerate seeding
Are useful during early stage of the plant growth
None of these
Help in development of starches of potatoes and grain

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