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.

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Chapter 3

NCERT

Class 10

Science

Solutions

3. 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.

Question:

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) sulphate	Copper(II) sulphate	Zinc sulphate	Silver nitrate
A	No reaction	Displacement	No reaction	Displacement
B	Displacement	No reaction	No reaction	No reaction
C	No reaction	No reaction	No reaction
D	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) sulphate?

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

Answer:

(i) Metal B is most reactive.

(ii) When metal B is added to copper (II) sulphate solution, displacement reaction occurs.

(iii) Metal B > Metal A > Metal C > Metal D

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