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.

Metal            Iron(II) sulfate   Copper(II)  sulfate Zinc sulfate Silver Nitrate
A No reaction Displacement - -
B Displacement  - - -
C No reaction No reaction No reaction Displacement
D No reaction No reaction No reaction  

Use the table above to answer the following questions about metals A, B, C, and D.

(i) Which is the most reactive metal?

(ii) What would you observe if B is added to a solution of Copper (II) sulfate?

(iii) Arrange the metals A, B, C, and D in the order of decreasing reactivity.

Asked by Vishal kumar | 2 years ago |  281

1 Answer

Solution :-

(i) Metal B is the most reactive as it gives displacement reaction with iron (II) sulphate.

(ii) When metal B is added to copper (II) sulphate solution, a displacement reaction will take place because of 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.

Answered by Vishal kumar | 2 years ago

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