Question

Nandita carried out a displacement reaction using an aqueous solution of ferrous sulphate and Aluminium metal that correct observation for her experiment would be 1. Formation of colourless solution and black deposit on aluminium 2. Formation of Pale green solutions and black deposit on aluminium 3. Formation of blue solution and reddish brown deposit on aluminium 4. Formation of colourless solution and yellow deposit on aluminium

Answer 1

when FeSO4 reacts with Al metal, we get colourless solution and greysih  black iron gets deposited.
3FeSO₄(aq) + 2Al(s) -----> 3Fe(s) + Al₂(SO4)₃(aq)
Conclusion:
-- Option 1 is Correct.