1.

Which of the following are combination reactions? i) 4K + O2 → 2K2O ii) CuSO4 + 2NH4OH → (NH4)2SO4 + Cu(OH)2 iii) 2ZnS + 3O2 → 2ZnO + 2SO2 iv) Na2O + H2O → 2NaOH

Answer»

Which of the following are combination reactions?

i) 4K + O2 → 2K2O

ii) CuSO4 + 2NH4OH → (NH4)2SO4 + Cu(OH)2

iii) 2ZnS + 3O2 → 2ZnO + 2SO2

iv) Na2O + H2O → 2NaOH




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