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?
 |
| 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
4. Extra Questions of Chapter 1
