NCERT activity 1.2 Class 9 Science with a conclusion

In this post, you will find NCERT Science Class 9 Chapter 1 Activity solutions. In Class 9 science chapter 1 matter in our surroundings consists of NCERT Activity 1.2 Class 9 Science Explanation with a conclusion. You can also go through Class 9 Maths Chapter 6- Lines and Angles.

 NCERT Activity 1.2 Class 9 Science Explanation with a Conclusion

You are suggested to study NCERT activity 1.2 class 9 science explanation with a conclusion so that you can attempt questions based on activity 1.2 class 9 science.

 

  

Activity 1.2 Class 9 Science

·     Take 2-3 crystals of potassium permanganate and dissolve them in 100 ml of water.

·     Take out approximately 10 ml of this solution and put it into 90 ml of clear water.

·     Take out 10 ml of this solution and put it into another 90 ml of clear water.

·     Keep diluting the solution like these 5 to 8 times

·     Is the water still coloured?

Matter is made up of small particles

Observation

when we add potassium permanganate into the water, water becomes pink or purple but on dilution, the intensity of colour decreases.

 Explanation

Crystal of potassium permanganate break down into smaller particles and these particles spread out into the water. The colour of the water becomes pink or purple.

On dilution, the colour of the solution in beaker 2, beaker 3 or beaker 4 is pink or purple but the intensity of colour becomes weak and the solution becomes lighter and lighter.

Conclusion

After observing this activity, we can conclude that each particle or piece of potassium permanganate is made up of a number of small particles like atoms.

On diluting these particles get divided and spread out in the solution, so a few crystals of KMnO₄ can make water pink or purple.

so it means one small crystal of potassium permanganate has millions of tiny particles.

 Questions based on activity 1.2 Class 9 Science

1.  Write the formula of Potassium permanganate?

Ans .-  KMnO₄

2.  What is the colour of the solution of potassium permanganate?

Ans. – Pink or purple

3.  What does this activity indicate?

Ans.- This activity indicates that each substance is made up of small particles and these particles are called atoms.

4.  Is the water in the last beaker coloured?

Ans. -Yes, the water in the last beaker colourd but the intensity of the colour is weak.

Related Topics 

1.   Activity 1.3 Class 9 Science

2.  Activity 1.1 Class 9 Science

2. Solutions of Chapter 1 Class 9 Science