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Saturday, November 12, 2022

Explain Activity 1.11 Class 10 NCERT Science

NCERT Class 10 Science Activity 1.11 Chemical Reactions and Equations

In this post, you will learn a complete explanation of activity 1.11 class 10 science that belongs to Chapter 1 Chemical Reactions and Equations.



Caution: This activity needs the teacher’s assistance.

 

 Activity- Heat a china dish containing about 1g copper powder, (fig)

·      What do you observe?


Explain Activity 1.11 Class 10 NCERT Science
Activity 1.11 


Observation 

 On heating, a black coating is formed on the surface of copper.


Conclusion 

The surface of copper powder becomes coated with black copper oxide. This is because of the oxidation of copper.

                                

 `2Cu        +    O2\overset{heat}{\rightarrow} 2CuO`

 Copper   Oxygen        Copper(II) oxide


If we pass hydrogen gas overheated copper oxide (CuO) the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained.


`CuO + H_2 \rightarrow Cu + H_2O`


In the above reaction, copper is oxidized to copper oxide, and oxygen is reduced to copper oxide. This is a redox reaction.


Watch the Video to understand activity 1.11



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Frequently Asked Questions


1. What is the colour of copper powder?

Ans. - Brown 


2. Which new substance is formed when the copper powder is heated?

    Ans.- Copper oxide is formed.


3. Write the chemical reaction of heating of copper powder.

Ans. - 2Cu + O2  → 2CuO


4. Name the reaction that takes place in activity 1.11 Class 10 Science.

Ans.-  Oxidation and combination reactions


5. What do you mean by an oxidizing agent?

Ans. The substance(element/atom) that oxidizes the other substance and gets reduced itself is called an oxidizing agent.


6. What is an oxidation reaction?

Ans.- The reaction in which a substance gains oxygen during the reaction is called an oxidation reaction.


 Related Topics for you


1.   Activity 1.10  Class 10 Science

2. Solution of Chemical Reactions and Equations

3. MCQ Questions of Chapter 1 

4. Extra Questions of Chapter 1