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Are all metals hard ?...

Are all metals hard ?

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VGS PUBLICATION-BRILLIANT-METALS AND NON-METALS-EXERCISE
  1. Which metal has highest ductility?

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  2. Sodium and potassium are stored in kerosene. Why?

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  3. Are all metals hard ?

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  4. Which non-metal has lustrous surface ?

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  5. Name one non-metal which is quite hard.

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  6. Give reasons for the following : Immersion rods for heating liquids ar...

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  7. Give reasons for the following : Immersion rods for heating liquids ar...

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  8. Copper cannot displace zinc from its salt solution. Give reason.

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  9. Why are aluminium foils used to wrap food items ?

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  10. what are different types of food sources.?

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  11. The doctor reported iron deficiency in my body. Where is iron in my bo...

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  12. I heard that magnesium is found in plants. In what form is it found in...

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  13. Gold jewellery does not become dull. Why ?

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  14. Predict the reason behind gold and platinum jewellery does not become ...

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  15. Which ga makes a pop sound if exposed to lighted matchstick?

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  16. Which substance liberates hydrogen when reacts with metals?

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  17. In a chemical reaction iron is unable to displace zinc from zinc sulph...

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  18. Why do silver jewellery, tarnish black after sometime ?

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  19. It is recommended that our old jewellery should not be polished by gol...

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  20. Which metals are used in making jewellery?Why?

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