Explain Activity 1.1 Class 10 NCERT Science

In this post, you will learn a complete explanation of activity 1.1 class 10 NCERT Science that belongs to Chapter 1 Chemical Reactions and Equations. You can also go through activity 1.2 of Chapter 1 Chemical Reactions and Equations.

Explain Activity 1.1 Class 10 Science

  

Caution: This activity needs the teacher’s assistance. It would be better if students wear eye protection.

Activity - Clean a magnesium ribbon about 2 cm long by rubbing it with sandpaper.

·      Hold it with a pair of tongs. Burn it using a spirit lamp or burner and collect the ash so formed in a watch glass as shown in the figure, Burn the magnesium ribbon keeping it as far as possible from your eyes.

·      What do you observe?

 

Explain Activity 1.1 Class 10 NCERT Science

Observation: Magnesium ribbon burns with a dazzling white light and changes into a white powder. The white powder is magnesium oxide.

Conclusion: It is clear that Mg burns and changes into a new substance of a new state, which is magnesium oxide (MgO).

MgO is formed by the reaction of magnesium with oxygen present in the air.

2Mg + O₂ → 2MgO

Watch the Video to understand Activity 1.1 Class 10 Science

 

MCQ Quiz for Activity 1.1 Class 10 Science

Queries based on Activity 1.1Class 10 Science

1.  Why magnesium ribbon is cleaned before burning?

Ans.- When magnesium ribbon remains in the air, it gets covered with a layer of magnesium oxide, so this layer should be removed before burning.

2.  Give the chemical name of the white powder obtained?

  Ans.- Magnesium oxide [MgO]

3.  Write the chemical reaction when magnesium burns?

Ans- 2Mg + O₂ →2MgO

Related Topics for you

1.  Activity 1.2 Class 10 Science

2. Solution of Chemical Reactions and Equations

3. MCQ Questions of Chapter 1 

4. Extra Questions of Chapter 1

5. How to balance a chemical equation

6. What happens during a chemical reaction