Which inetal does not undergo corrosion due to the formation of oxide layer?
1). Copper
2). Iron
3). Aluminium
4). Zinc
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2. The antiparticle of an electron is
3. Cloud is a colloidal dispersion of
4. Which gas does not form the part of atmosphere ?
5. Acid rain is caused by the?pollution of environment by-
6. Atomic number of an atom gives the number of which of the following ?
7. Question 16.17:What are artificial sweetening agents? Give two examples.
8. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :