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(a) What is the activity series of metal...

(a) What is the activity series of metals ? Arrange the metals Zn, Mg, Al, Cu and Fe in a decreasing order of reactivity.
(b) What would you observe when you put
(i) some zinc pieces into blue copper sulphate solution ?
(ii) some copper pieces into green ferrous sulphate solution ?
(c ) Name a metal which combines with hydrogen gas. Name the compound formed.

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(a) (i) Blue colour of copper sulphate solution would slowly disappear.
(ii) No change would be noticed.
(c ) Sodium combines with hydrogen to form sodium hydride.
`2Na + H_(2)rarr underset("Sod. hydride")(2NaH)`
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DINESH PUBLICATION-METALS AND NON-METALS-Long Answer Questions
  1. (a) All ores are minerals but all minerals are not ores. Justify. (b...

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  2. (a) What is the activity series of metals ? Arrange the metals Zn, Mg,...

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  3. (a) Which of the following metals would give hydrogen when added to di...

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  4. How will your demonstrate that the ionic compounds do not conduct elec...

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  5. With a suitable activity show that sulphur burns in air to form a comp...

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  6. (a) Define corrosion, what is the nature given to corrosion of iron ? ...

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  7. Give reasons for the following : (i) Zinc can displace copper from c...

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  8. (a) Distinguish between 'roasting' and 'calcination'. Which of the two...

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  9. Give an example of a metal which (i) is a liquid at room temperature...

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  10. (a) Write the balanced chemical equations for the extraction of copper...

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  11. (a) Write method will you use to reduce the following ? Explain by giv...

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  12. (a) Why are ionic compounds usually hard crystalline solids ? (b) Gi...

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  13. (a) Write the balanced chemical equations for the extraction of copper...

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  14. (A) Name the components of the alloy steel and stainless steel. (b) ...

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  15. A metal M found in nature as sulphide ore (M(2)S) is one of the good c...

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  16. State the reason why (i) carbon is not used to reduce the oxides of...

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  17. (a) Write the chemical reactions taking place when : (i) Manganese ...

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  18. (a) White the steps involved in the extraction of pure metals in th...

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  19. A metal 'X' acquires a green colour coating on its surface on exposure...

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  20. Give reasons for the following : Ionic compounds have high melting ...

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