NCERT Activity 3.8 Class 10 Science Explanation

In this post, you will find NCERT Activity 3.8 Class 10 Science Explanation that belongs to Chapter 3 Metals and Non-metals. After reading Solutions of chapter 3 Metals and Non-metals, you will be able to understand activity 3.8.

NCERT Activity 3.8 Class 10 Science Explanation

 

 Activity 3.8 Class 10 Science 

·      Take a magnesium ribbon and some sulphur powder.

·      Burn the magnesium ribbon. Collect the ashes formed and dissolve them in water.

·      Test the resultant solution with both red and blue litmus paper.

·      Is the product formed on burning magnesium acidic or basic?

·      Now burn sulphur powder. Place a test tube over the burning sulphur to collect the fumes produced.

·      Add some water to the above test tube and shake.

·      Is the product formed on burning sulphur acidic or basic?

·      Can you write equations for these reactions?

Observation

When a substance is burnt in the air, it reacts with the oxygen present in the air.

 Conclusion: The solution obtained on dissolving ashes after burning magnesium, turns litmus blue and on the other hand solution obtained on dissolving gases from burning sulphur (SO_2, SO₃) are acidic. The reaction is:

 

2Mg(s) + O₂(g) →  2MgO(s)

Magnesium

MgO(s) +  H₂O(l)  →  Mg(OH)₂(aq)

                                 Magnesium hydroxide

S(s) + O₂ (g) →  SO₂ (g)

sulphur

SO₂(g) + H₂O(I) → H₂SO₃(aq)

                               Sulphurous acid

Metal oxides are basic and non-metal oxides are acidic in nature. 

    Related Topics - 

1. Next activity - Activity 3.9

2. Previous activity -Activity 3.7

3. Solution of Chapter 3 Metals and Non-metals

4. MCQ Questions of Chapter 3

5. Extra Questions of Chapter 3

6. Solutions of Class 10 Science all chapters