Activity 1.8 Class 10 Science

This activity explains the Photolysis of silver chloride in the presence of sunlight

Photolysis of Silver Chloride

Caution: This activity needs the teacher’s assistance.

Aim of Activity

To find the change in colour of silver chloride after decomposition

 Procedure

1. Take about 2 g of silver chloride in a China dish.

2. What is its colour?

3. Place this China dish in sunlight for some time

4 . Observe the colour of the silver chloride after some time.

 

Observation

When silver chloride is placed in the sunlight.  Colour of silver chloride changes.

Conclusion

On the decomposition of silver chloride which is white in colour, it changes to grey.

             sunlight

2AgCI (s) →   2Ag(s) + CI₂ (g)

(white)                         (grey)

Silver chloride decomposes into silver and chlorine. 

so, the decomposition reaction takes place in the presence of sunlight, it is called Photolysis.

You can watch the video for this activity 

1. Activity Video

Frequently asked questions

   1. What is the colour of silver chloride?

Ans. Silver chloride is a white powder.

   2. Name the reaction that takes place in this activity.

Ans. Photolysis

 3. Name the substance formed after the decomposition of silver chloride.

    Ans. Silver (Ag) and chlorine (Cl)

  4. Write the definition of ‘Decomposition reaction’.

Ans. Complex substance breaks down into two or more simple substances in the presence of energy(heat, light, electricity )

  5. Give the chemical equation of the reaction.

Ans.  2AgCl  → 2Ag+ Cl₂

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