Samples of four metals A, B, C, and D were taken and added to the following solution one by one.
The results obtained have been tabulated as follows.

MetalIron (II) sulphateCopper (II) sulphateZinc sulphateSilver nitrate
ANo reactionDisplacement
BDisplacementNo reaction
CNo reactionNo reactionNo reactionDisplacement
CNo reactionNo reactionNo reactionNo reaction

Use the table above to answer the following questions about metals A

AcademicChemistryNCERTClass 10

(i) B is the most reactive metal because it gives a displacement reaction with iron (II) sulphate.

(ii) When metal B is added to copper (II) sulphate solution, a displacement reaction will take place due to which the blue colour of copper (II) sulphate solution will fade and a red-brown deposit of copper will be formed on metal B.

(iii) Metal B is the most reactive because it displaces iron from its salt solution. Metal A is less reactive because it displaces copper from its salt solution. Metal C is still less reactive because it can displace only silver from its salt solution and metal D is the least reactive because it cannot displace any metal from its salt solution. Hence, the decreasing order of reactivity of the metals is B > A > C > D.
Updated on 10-Oct-2022 12:46:52