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Which apparatus is required to test hydr...

Which apparatus is required to test hydrogen gas?

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VGS PUBLICATION-BRILLIANT-METALS AND NON-METALS-EXERCISE
  1. Why do silver objects and jewellery become black after some time ?

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  2. Why do statues and vessels made up of copper become dull green after c...

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  3. Which apparatus is required to test hydrogen gas?

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  4. How do non-metals generally react with acids?

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  5. Which of the following is metal displacement reaction

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  6. Which metal has highest ductility?

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

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  8. Are all metals hard ?

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  9. Which non-metal has lustrous surface ?

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

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

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

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

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

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  15. what are different types of food sources.?

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

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

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  18. Gold jewellery does not become dull. Why ?

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

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

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