Question

Illustrate: i) Corrosion of metals is NOT always harmful. ii)Both Calcium and Magnesium are heavier than water but still float over it. iii) Metals are electropositive but non metals are electronegative

Answer 1

Answer:

i)Aluminium develops a layer of oxygen which prevents further corrosion

ii)Hydrogen gas released sticks on Mg and Ca so that they float

iii)Metals when form compound donate electrons whereas non-metals take electrons, hence they are called electopositive and electo negative respectively.

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Answer 2

Answer: Hope you this will help you