Class 10 NCERT Science Activity 2.4 Explanation

In this post, you will find Class 10 NCERT Science Activity 2.4 Explanation in detail. This activity is based on chapter 2 Acids, Bases, and Salts of class 10 science.

Class 10 NCERT Science Activity 2.4 Explanation

 

Activity- Place a few pieces of granulated zinc metal in a test tube.

·      Add 2 ml of sodium hydroxide solution and warm the contents of the test tube.

·      Repeat the rest of the steps as in activity  2.3  and record your observation.

Observations- The gas burns with a blue flame and creates a popping sound.

Conclusion- Bases react with metals; such as zinc and aluminum to liberate hydrogen gas.

2NaOH(aq)     +      Zn(s)   →    Na₂ZnO₂(aq) +   H₂(g)

Sodium hydroxide Zinc              Sodium zincate 

Watch the Video to understand activity 2.4 Class 10 Science

Frequently Asked Questions

   1.  Name the gas that evolved when metal reacts with a base.

Ans. Hydrogen gas

   2.  Give the chemical equation for the reaction.

Ans. – Zn + NaOH → Na₂ZnO₂ + H₂

   3.  Name the reaction that takes place in activity 2.4 class 10 science.

Ans.-  Displacement reaction

   4.  Name the salt formed when sodium hydroxide reacts with zinc.

Ans. – Sodium zincate (Na₂ZnO₂)

Related Topics 

1.  Activity 2.5

2. Activity 2.3

2. Solutions of Chapter 2 

3. MCQ Questions of Chapter 2

4. Extra Questions of Chapter 2