Activity 4.8 Class 8 Science Chapter 4

 

  Activity 4.7 Class 8 Science Chapter 4 Materials: Metals and Non-metals

 In this post, you will find NCERT Science Class 8 Chapter 4 Materials: Metals and Non-metals Activity solutions.  Class 8 science chapter 4 consists of NCERT Activity 4.8 Class 8 Science Explanation with a conclusion.

NCERT Activity 4.8 Class 8 Science Explanation with a conclusion

You are suggested to study NCERT activity 4.8 class 8 science explanation with a conclusion so that you can attempt questions based on activity 4.8 class 8 science.

Activity 4.8 Class 8 Science

·     Take five 100mL beakers and label them A, B, C, D and E.

·     Take about 50mL of water in each beaker.

·     Dissolve in each beaker a teaspoonful of each substance as shown in the figure.

·     Keep the beakers undisturbed for some time.

·     Record your observations in your notebook.

 

Procedure of Activity 4.8 Class 8 Science

·     We take five 100 mL beakers and label them A, B, C, D and E.

·     Take copper sulphate solution in beakers A and B.

·     Take zinc sulphate solution in beaker C, iron sulphate solution in beaker D and zinc sulphate solution in beaker E.

·     Now add Zinc granules in beaker A, iron fillings in beaker B, copper turnings in beakers C and D and iron nails in beaker E.

Observation of Activity 4.8 Class 8 Science

We notice a change in colour in beakers A and B but there is no change in the colour of solutions in beakers C, D and E.

Explanation of Activity 4.8 Class 8 Science

In beaker A, Zinc displaces copper from the copper sulphate solution and forms Zinc sulphate. The Colour of the solution gets faded.

Zn + CuSO₄  → ZnSO₄ + Cu

In beaker B, iron displaces copper from the copper sulphate solution and forms iron sulphate. The Colour of the solution gets faded.

 

Fe + CuSO₄  → FeSO₄ + Cu

 So, in the above reactions, Zinc and iron displace copper from the copper sulphate solution, because Zinc and iron are more reactive than copper.

In beakers C, D and E, no reaction takes place.

Following is the reactivity series of given metals

                Zn > Fe  >  Cu

Conclusion of Activity 4.8 Class 8 Science

This activity shows the reactivity of metals and displacement reaction.

 Related Topics 

   1. Activity 4.7 Class 8 Science

   2. Activity 4.6 Class 8 Science