Question

Green colored ferrous sulphate solution is taken in four beakers A, B, C and D. Strips of magnesium, zinc, copper and silver are dipped in A, B, C and D respectively. Green colour fades away slowly in two beakers. Identify the beakers.
a.) A and B
b.) C and D
c.) A and C
d.) B and D

Answer 1

Hint:
1. It is important for many processes in the body, including regulating muscle and nerve function, blood sugar levels, and blood pressure and making protein, bone, and DNA.
2. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed.

Complete step by step answer:
Generally you should know that ferrous sulphate is also obtained as a by-product in the manufacture of titanium pigment and copper sulphate. The gas given out smells the characteristic odour of burning sulphur. Ferrous sulphate crystals contain water of crystallisation. When ferrous sulphate is heated, it gives ferric oxide, sulphur dioxide and sulphur trioxide.

Let us know about the displacement reaction!
Displacement reaction is generally a chemical reaction in which a more reactive element displaces a less reactive element from its compounds. Example: Reaction of iron nails with sulphate solution.

Magnesium and zinc being more reactive displaces iron from its solution. Thus, the green colour fades away in test tubes A and B.
Therefore, Option A is the required answer!

Note: Remember that in a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions.