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Complete and balance the following chemical reactions :

(i) Cu(BO2)2 + C + fused → 

(ii) AgBr + NH4OH →

(iii) Cr(OH)3 + Na2CO3 + KNO3 + fused →  

(iv) Cu(NO3)2  + Δ →

(v) CaSO3 + SO2 + H2O →

1 Answer

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(i) 2Cu(BO2)2 + C → 2CuBO2 + B2O3 + CO 

 2Cu(BO2)2 + 2C → 2Cu + 2B2O3 + 2CO 

(ii) AgBr + 2NH4OH → [Ag(NH3)2]Br + 2H2

(iii) 2Cr(OH)3 + 2Na2CO3 + 3KNO3 + fused → 2Na2CrO4 + 3KNO2 + 2CO2 + 3H2

(iv) 2Cu(NO3)2 → 2 CuO + 4NO2 + O

(v) CaSO3 + SO2 + H2O → Ca(HSO3)2

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