Activity 4.3 Class 8 Science Chapter 4 Materials: Metals and Non-metals

 Activity 4.3 Class 8 Science Chapter 4

 

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 4.3 Class 8 Science Explanation with a conclusion.

NCERT Activity 4.3 Class 8 Science Explanation with a conclusion

You are suggested to study NCERT activity 4.3 class 8 science explanation with a conclusion so that you can attempt questions based on activity 4.3 class 8 science.

Activity 4.3 Class 8 Science

   ·     Let us check the nature of rust formed as a result of the reaction between iron, oxygen, and water.

   ·     Collect a spoonful of rust and dissolve it in a very little amount of water.

   ·     You will find that the rust remains suspended in water.

·     Shake the suspension well.

   ·     Test the solution with red and blue litmus papers.

   ·     What do you observe? Is the solution acidic or basic?

      

Rusting of iron

Observation of Activity 4.3 Class 8 Science

Rust is hydrated iron oxide. The solution of rust changes red litmus into blue.

Explanation of Activity 4.3 Class 8 Science

Rust is formed when iron or iron objects are exposed to the atmosphere, they react with oxygen (air) and moisture, and a brown or orange-colored layer is formed that is called ‘rust’.

4Fe + xH₂O + 3O₂ → 2Fe₂O₃.xH₂O

Metal oxides are basic in nature. So the solution of rust turns red litmus into the blue.

Conclusion of Activity 4.3 Class 8 Science

This activity shows that metal oxides are basic in nature.

 

    Related Topics 

•    Activity 4.1 Class 8 Science
•    Activity 4.2 Class 8 Science