a) What is corrosion? Give examples.

What is metamorphosis? Give example.

What is corrosion? Give two measures for the prevention of corrosions of metals.

What is metamorphosis ? Give examples

What is metallie corrosion ? Give one example.

What is imitation? Give an example.

a) What is corrosion? b) Write the effects of corrosion. c) How can prevent it ?

what is a retrovirus?Give example?

(i) What is corrosion of metals ? (ii) Name a metal which does not corrode. (iii) Give two methods to prevent corrosion of metals.