Bright Tutorials Bright Tutorials
ICSE Class 10 Chemistry Question 6 of 23

Solved 2024 Specimen Paper ICSE Class 10 Chemistry — Question 9

Back to all questions
9
Question

Question 1(ix)

A ............... solution is observed after placing Magnesium metal in a solution of Copper sulphate for half an hour.

  1. Blue
  2. Colourless
  3. Reddish brown
  4. Dirty green
Answer

Colourless

Reason — According to the reactivity series of metals, magnesium is more reactive compared to copper. Hence, it replaces copper from CuSO4 and the blue colour fades as colourless magnesium sulphate is formed and brown bits of copper metal form a precipitate:

Mg + CuSO4 ⟶ MgSO4 + Cu