Answer :

(i) 2HgO 2Hg + O2

(ii)


(iii) 4Al + 3MnO2 2Al2O3 + 3Mn


(iv) FeO3 + 2Al 2Fe + Al2O3


(v) ZnCO3 ZnO + CO2


OR


Mg + Cl2 MgCl2



(II)  Ionic compounds: are formed when atoms of different charges (i.e. positive and negative ions) come together and transfer electron. These ionic bonds are typically very strong due to the high attractive forces holding the positively and negatively charged ions together (called electrostatic forces of attraction).


(III)


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