Question

34. Iron sulphate solution was taken in two test tubes A and B. Zinc and aluminium were
added in A and B respectively. After reaction colour of A and B would be
a. Blue and green
b. light green and reddish brown
c. colourless and white
d. none of the above

Answer 1

Answer:

No reaction occurs when any of the metals from zinc, iron, aluminium, and copper are placed in aqueous solution of Al2(SO4)3. Aluminium is more reactive than zinc.

So ur answer must be none of the above....

Option D is correct.

Hope it helps u

Answer 2

Answer:

The correct answer is c. colourless and white

Explanation:

Test tube A:

When zinc is added to test tube A containing Iron sulphate solution, the colour of the iron sulphate solution changes to colourless. Zinc, being more reactive than iron, displaces iron from iron sulphate solution. The products are grey coloured precipitated iron and colourless zinc sulphate solution.

The reaction is given below:

Zn + FeSO₄  ------->  ZnSO₄ + Fe

Test tube B:

When aluminium is added to test tube B containing Iron sulphate solution, the colour of the iron sulphate solution changes to white. Aluminium, being more reactive than iron, displaces iron from iron sulphate solution. The products are grey coloured precipitated iron and white coloured Aluminium sulphate solution.

The reaction is given below:

2Al + 3FeSO₄    ------------>   Al₂(SO₄)₃  +  3Fe

Hence, the colour of A is colourless and that of B is white.

So, the correct answer is option c. colourless and white.

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