Activity 4.4 Class 8 Science Chapter 4 Materials: Metals and Non-metals

 Activity 4.4 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 4.4 Class 8 Science Explanation with a conclusion.

NCERT Activity 4.4 Class 8 Science Explanation with a conclusion

You are suggested to study NCERT activity 4.4 class 8 science explanation with a conclusion so that you can attempt questions based on activity 4.4 class 8 science.

Activity 4.4 Class 8 Science

   ·     Take a small amount of powdered sulphur in deflagrating spoon and heat it.

   ·     If deflagrating spoon in not available, you may take a metallic cap of any bottle and wrap a metallic wire around it and give it the shape.

   ·     As soon as sulphur starts burning introduce the spoon into a gas jar/ glass tumbler.

   ·     Cover the tumbler with a lid to ensure that the gas produced does not escape.

   ·     Remove the spoon after some time.

   ·     Add a small quantity of water into the tumbler and quickly replace the lid.

   ·     Shake the tumbler well.

  ·     Check the solution with red and blue litmus papers.

     

 Activity 4.4 Class 8 Science Materials: Metals and Non-metals

Observation of activity 4.4 Class 8 Science

The solution of sulphur turns blue litmus into the red.

Explanation of activity 4.4 Class 8 Science

When sulphur is burnt, it reacts with atmospheric oxygen and forms sulphur dioxide.

                   S   + O₂  →SO₂

When sulphur dioxide is dissolved in water, sulphurous acid is formed.

          SO₂ + H₂O  →H₂SO₃

Sulphurous acid turns blue litmus paper red.

So oxides of non-metals are acidic in nature.

Conclusion of activity 4.4 Class 8 Science

Oxides of non-metals are acidic in nature.

Precaution: This activity should be done with the teacher’s assistance.

 Related Topics 

  1. Activity 4.5 Class 8 Science

  2. Activity 4.3 Class 8 Science