Question

Write three differences between metals and non- metals on the basis of chemical properties

Answer 1

S.No	Basis	Metals	Non-metals
(i)	Reaction with oxygen	Almost all metal react with oxygen to form metals oxide. 4Na + O2 → 2Na2O	Non-metals react with oxygen to form acidic oxides. C + O2→ CO2
(ii)	Reaction with water	Only reactive metals react with water to form oxides or hydroxides and liberate hydrogen gas. 2K(s) + 2H2O(l) →2KOH (aq) + H2(g)	Non-metals do not react with water
(iii)	Reaction with diluted acid	All metals react with diluted acids to form a salt and evolve hydrogen gas. Zn + 2HCl(dil) →ZnCl2 + H2	They do not react with dilute acids. These are not capable of replacing hydrogen.