Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which of the following combinations of metal and metal salt solution will undergo a displacement reaction?

• A. Copper and sodium chloride solution
• B. Magnesium and sodium chloride solution
• C. Silver and copper sulphate solution
• D. Aluminium and copper nitrate solution

Answer 1

The correct option is D Aluminium and copper nitrate solution

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In a displacement reaction, a more reactive metal displaces a less reactive metal from its salt solution.
The order of reactivity of the metals given in the options is as follows:
Silver < Copper < Aluminium < Magnesium < Sodium

• In option A, displacement reaction will not take place as copper is less reactive than sodium and cannot displace sodium from sodium chloride solution.
• In option B, displacement reaction will not take place as magnesium is less reactive than sodium and cannot displace sodium from sodium chloride solution.
• In option C, displacement reaction will not take place as silver is less reactive than copper and cannot displace copper from copper sulphate solution.
• In option D, displacement reaction will take place as aluminium is more reactive than copper. The reaction will lead to the formation of aluminium nitrate and copper metal.