In this post, you will learn a complete explanation of activity 1.4 class 10 science that belongs to Chapter 1 Chemical Reactions and Equations. You can also go through Activity 1.5 of Chapter 1 Chemical Reactions and Equations.
Explain Activity 1.4 Class 10 NCERT Science
Caution: This activity
needs the teacher’s assistance.
Activity- Take a small
amount of calcium oxide or quick lime in a beaker.
· Slowly
add water to this.
· Touch
the beaker as shown in figure
· Do
you feel any change in temperature?
Observation and Conclusion:
Calcium oxide and water combine vigorously to produce slaked lime (Calcium
hydroxide), releasing a large amount of heat.
The reaction is highly vigorous in nature. It is
accomplished by a hissing noise, bubbles, and calcium hydroxide (slaked lime) is
formed. Heat is evolved during the reaction hence; it is an exothermic reaction.
CaO(s) + H2O(I) → Ca(OH)2(aq)
Quick lime Water
Slaked lime
Calcium hydroxide is formed by the combination of calcium
oxide and water. Therefore, the reaction is a combination reaction.
Watch the video to understand activity 1.4
Related Topics for you
1. Activity 1.5 Class 10 Science
2. Activity 1.3 Class 10 Science
2. Solution of Chemical Reactions and Equations
4. Extra Questions of Chapter 1
FAQs
1. What is the purpose of activity 1.4 in class 10 NCERT science?
Ans - To understand the reaction between calcium oxide and water.
2. What materials are required for activity 1.4 Class 10Science?
Ans- Calcium oxide and water, beaker are needed for activity 1.4 class 10 science.
3. What is the purpose of touching the beaker in activity 1.4 class 10 science?
Ans - WE can feel a change in temperature that occurs during the chemical reaction between calcium oxide and water.
4. What is the observation of activity 1.4 class 10 science?
Ans - We observe that calcium oxide and water react vigorously and form slaked lime.
5. What is the chemical equation of activity 1.4 Class 10 science?
Ans- `CaO + H_2O \rightarrow Ca(OH)_2`
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