Question

what happen when
1 magnesium is burnt in air
2 an acid react with base
3 iron nail is dipped in copper sulphate solution
4 electric current is passed through water
5 calcium carbonate is heated


plz tell answer ​

Answer 1

• Mg + O2 ---------> 2MgO(magnesium oxide)
• ACID + BASE------>SALT + WATER (neutralizaton reaction)
• Fu + CuSO4 ------>FeSO4 + Cu (displacement reaction)
• H2O ------->H2+O2 (Electrolysis of water)
• CaCO3 ----------> CaO + CO2 (DECOMPOSITION REACTION)

Answer 2

1. It will give dazzle flam when it reacts with oxygen in air

2.they form salt + hydrogen ions

3. The solution turns to iron sulpahte. You will find some reddish brown substances in iron nail that is copper