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|
|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.
(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
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?