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An Intiative by Sri Chaitanya
a
Using ‘Triple phosphate of lime’ in place of ‘super phosphate of lime
b
Using UPS at times of power cuts
c
Replacing manual weeding by weedicides
d
Using SO2
answer is A.
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Detailed Solution
Superphosphate of lime is prepared to convert calcium phosphate (insoluble) into a soluble phosphate but it contains 2 moles of gypsum as a waste productCa3PO42+2H2SO4+5H2O→ CaH2PO42H2O.Calcium Super phosphateBut if H3PO4 is used in place of H2SO4 , the only product obtained is CaH2PO42which is water soluble.Ca3PO42+4H3PO4→3CaH2PO42Calcium triple phosphate.