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What products are formed :

(i) When Ag2CO3 is strongly heated. 

(ii) Disodium hydrogen phosphate is added to magnesium sulphate solution containing ammonium hydroxide. 

(iii) A solution containing Zn2+ ions is poured in an aqueous ammonia. 

(iv) Bi(NO3)3 solution is mixed with KI and then resulting mixture is saturated with exess of KI solution. 

(v) Disodium hydrogen phosphate is boiled with conc.HNO3 and ammonium molybdate solution.

1 Answer

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(i) Ag2CO3 + Δ → 2Ag + CO

(ii) MgSO4 + NH4OH + Na2HPO4 → Mg(NH4)PO4 ↓ (white) + H2O + Na2SO4 

(iii) Zn2+ + 2NH4OH → Zn(OH)2 ↓ (white) + 2NH4+ 

 Zn(OH)2 + 4NH4OH → [Zn(NH3)4] (OH)2 + 4H2

(iv) 2Bi(NO3)3 + 6KI → 2Bi ↓ (Black) + 6KNO3 + 3I2 

I2 + KI → KI3 (Yellow solution) 

(v) Na2HPO4 + 12 (NH4)2MoO4 +23 HNO3 → (NH4)3PMo12O40 ↓ (Canary yellow) + 2NaNO3 + 21NH4NO3 + 12H2

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