1.

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

Answer»

Three differences between metals and non-metals on the basis of chemical properties : 

S.No               Basis                 Metals          Non-metals
           (i)Reaction with oxygenAlmost 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 waterOnly 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.
 


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