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What happens when calcium is treated wit...

What happens when calcium is treated with water?
(i) It does not react with water. 
(ii) It reacts violently with water.
(iii) It reacts less violently with water. 
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.

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Calcium reacts less violently with water and bubbles of hydrogen gas stick to its surface.
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VK GLOBAL PUBLICATION-METALS AND NON-METALS-VERY SHORT ANSWER QUESTIONS
  1. Which of the following metals will melt at body temperature? Gallium...

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  2. Name two metals that do not react with water at all.

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  3. What happens when calcium is treated with water? (i) It does not rea...

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  4. Generally, non-metals are not lustrous. Which of the following non-met...

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  5. What is the nature of non - metal oxide?

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  6. What is the nature of metal oxides?

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  7. Why do copper objects develop a green coating in air?

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  8. Why do silver articles become black after some time ?

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  9. Which oxide of iron could be obtained on prolonged reaction of iron wi...

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  10. Why are ionic compounds usually hard?

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  11. Why does aluminium not react with water under ordinary conditions?

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  12. In nature, metal A is found in a free state while metal B is found in ...

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  13. Arrange the following metals in decreasing order of their reactivity. ...

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  14. Why cannot aluminium be obtained by reduction of its oxide with carbon...

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  15. Why does a little addition of carbon in iron make it more useful?

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  16. Give an example of a sulphide ore which is reduced to metal by heating...

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  17. Metals are refined by using different methods. Which of the following ...

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  18. What is rust ?

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  19. What is corrosion?

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  20. What is aqua regia? Write its reaction product with gold and platinum.

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