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The wires carrying current in homes have...

The wires carrying current in homes have a coating of PVC. Why ?

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DINESH PUBLICATION-METALS AND NON-METALS-Very Short Answer Questions
  1. A non-metal X exists in two different forms Y and Z. Y is hardest natu...

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  2. Name a non-metal which reacts with very dilute nitric acid to evolve h...

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  3. If copper metal is heated over a flame, it develops a coating. What is...

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  4. Why does not stainless steel get rusted easily ?

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  5. Why can we use gold and platinum in jewellery ?

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  6. Give chemical names of the two salts belonging to sodium family.

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  7. Name any one alloy made from (i) a metal and a non-metal (ii) two meta...

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  8. Why do we apply paint on iron articles?

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  9. Write the balanced chemical equation for the chemical reaction between...

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  10. Ionic solids conduct electricity in the molten state and not in the so...

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  11. In one method of rust prevention, the iron is not coated with anything...

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  12. The wires carrying current in homes have a coating of PVC. Why ?

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  13. Aluminium oxide and zinc oxide react with both acids are bases to prod...

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  14. Name the constituents elements of the alloys (i) Brass (ii) Bronze (ii...

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  15. Out of silver and copper metals, which is more reactive and why ?

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  16. Explain why the surfaces of some metals become dull when exposed to ai...

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  17. why are metals called electropositive elements whereas non-metals are ...

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  18. What happens when a piece of sodium metal is dropped in water taken in...

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  19. A copper coin is kept immersed in a solution of silver nitrate for som...

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  20. Which allotrope of carbon is used for making electrodes?

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