1.

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

Answer»
          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.
 


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