Question

3. Samples of four metals A, B, C and D were taken and added to the following solutions one by one. The
results obtained have been tabulated as follows:
Zinc Sulphate
Silver Nitrate
Imao il Sulphate Copper II Sulphate
Nordrhen Displacemen
Displacement
No Reaction
Na reaction
No Reaction
No Reaction
No Reaction
No Reaction
Displacement
No Reaction​

Answer 1

$\huge\rm\underline\purple{Question :-}$

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

$</p><p>\begin{tabular}{|c|c|c|c|c|}</p><p></p><p></p><p></p><p></p><p> \cline{1-5} Metal & Iron( II ) Sulphate & Copper ( II ) Sulphate & Zinc sulphate & Silver nitrate \\</p><p></p><p> \cline{1-5} A & No reaction & Displacement & & \\</p><p></p><p>B & Displacement & & No reaction & \\</p><p></p><p>C & No reaction & No reaction & No reaction& Displacement \\</p><p>D & No reaction & No reaction & No reaction& No reaction \\</p><p></p><p></p><p> \cline{1-5}</p><p></p><p>\end{tabular}</p><p>$

(i) Which is the most reactive metal?

(ii) What would you observe if B is added to a

solution of copper (II) sulphate?

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

$\large{\underbrace{\sf{\red{ Required\:Answer :}}}}$

(i) B is the most reactive metal. [because it gives displacement reaction with Iron (II) sulphate].

(ii) When metal B is added to copper (II) sulphate solution, a displacement 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, metal A is less reactive, metal C is still less reactive, and metal D is the least reactive. So, the decreasing order of reactivity of the metals is: B > A > C > D.

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Answer 2

(i) B is the most reactive metal. [because it gives displacement reaction with Iron (II) sulphate].

(ii) When metal B is added to copper (II) sulphate solution, a displacement 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, metal A is less reactive, metal C is still less reactive, and metal D is the least reactive. So, the decreasing order of reactivity of the metals is: B > A > C > D.

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