NCERT Activity 4.5 Class 10 Science Explanation with conclusion

If you are looking for NCERT Science Class 10 Chapter 4 Activity solutions, then you are in the right place. In this post, you will find NCERT Activity 4.5 Class 10 Science Explanation with conclusion.

NCERT Activity 4.5 Class 10 Science Explanation with conclusion

You are suggested to study NCERT activity 4.5 class 10 science explanation with conclusion so that you can attempt questions based on the activity 4.5 class 10 science.

 
Chapter 4 - Carbon and its Compounds

 

 

Activity 4.5 Class 10 Science

·      Take about 3ml of ethanol in a test tube and warm it gently in a water bath.

·      Add a 5% solution of alkaline potassium permanganate drop by drop to this solution.

·      Does the colour of potassium permanganate persist when it is added initially?

·      Why does the colour of potassium permanganate not disappear when excess is added?

Discussion: In addition to a 5% solution of alkaline KMnO₄ to warm alcohol drop by drop, the colour of KMnO₄ disappears initially because it oxidises ethanol to ethanoic acid.

 

                  Alkaline KMnO₄

CH₃CH₂OH -----------------→CH₃COOH

When potassium permanganate is added in excess, its colour does not disappear because the reaction with alcohol stops.

 

Conclusion: With alkaline KMnO₄, Ethyl alcohol gets oxidised to ethanoic acid which turns blue litmus red.

Queries based on activity 4.5 Class 10 Science

1. What is  Oxidation?

Ans-  The reaction which involves the addition of oxygen to any substance is known as oxidation.

2. What is an oxidising agent?

Ans- The substance which is capable of adding oxygen to other substances are called oxidising agents.

Related Topics - 

1. Next  activity - Activity 4.6 Class 10 Science

2. Previous activity - Activity 4.4 Class 10 Science

3. Solution of Chapter 4 Carbon and its Compounds

4. MCQ Questions of Chapter 4

5. Extra Questions of Chapter 4

6. Solutions of Class 10 Science all chapters