Answer :
1. N2+3H2=2NH3.
2. N2+2O2=2NO2.
3. 4Cu+O2=2Cu2O.
4. Zn+2HCl=ZnCl2+H2.
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2. N2+2O2=2NO2.
3. 4Cu+O2=2Cu2O.
4. Zn+2HCl=ZnCl2+H2.
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