Fertiliser Technology
Which of the following solvents is used for the extraction of H₃PO₄ from CaCl₂ solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

Hexane
Butyl alcohol
Iso propyl alcohol
Toluene

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Fertiliser Technology
Potassic fertilisers

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

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