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in P - block elements by (63.7k points)

How will you obtain : 

(A) Ammonia from quick lime (in three steps) 

(B) H3PO4 from phosphorite (in two steps only)

(C) Meta phosphate from primary phosphate (one step) 

(D) Phosphine from hypophosphorus acid (one step)

1 Answer

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Best answer

(A) CaO + 3C + (800 - 1000°C) → CaC2 + CO 

CaC2 + N2 → CaCN2 + C

CaCN2 + 3H2→ CaCO3 + 2NH3

(B) 2Ca3(PO4)2 + 6SiO2  6CaSiO3 + P4O10 

P4O10 + 6H2→ 4H3PO4

(C) NaH2PO4 + Δ → NaPO3 + H2O

(D) 3H3PO2 + Δ → PH3 + 2H3PO3

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