(a) What would you observe when you put: (i) Some zinc pieces into blue copper sulphate solution?

CBSE Class 10 CBSE Class 10 Science
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1

(a) What would you observe when you put:

  1. Some zinc pieces into blue copper sulphate solution?
  2. Some copper pieces into green ferrous sulphate solution.

(b) Name a metal which combines with hydrogen gas. Name the compound formed.

2

(a)

  1. When zinc pieces are put into blue colour copper sulphate solution, Zinc displaces copper from copper sulphate solution. In this process, blue copper sulphate solution turns into colourless.
    Zn(s) + CuSO4(aq) → Cu(s) + ZnSO4(aq)

  2. No reaction, As Cu is less reactive than iron. So, it cannot displace iron from its salt solution.

(b) Alkali metals and Alkaline earth metals combine readily with hydrogen. The compound of these metals with hydrogen are metal hydrides. Example; sodium hydride (NaH), Calcium Hydride (CaH2).