Activity to show the decomposition reaction
Answers
Answer:
The decomposition reaction carried in the presence of sun light is known as photochemical decomposition.
Take about silver chloride in a china dish.
Place the China dish in front of sunlight for some time.
Observe the colour of the sunlight.
It will be observed that in the presence of sunlight, white silver chloride turns grey.
One use of it is that this reaction is used in the process of extraction of various metals.
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Example of a decomposition reaction: When lead nitrate is heated in a test tube, it forms lead oxide, nitrogen dioxide and oxygen.
Activity: Take lead nitrate powder which is
white incolour in a test tube. Heat this test tube over a flame.
Observation: Brown fumes are evolved and brownish residue is left in the test tube.
Conclusion: Decomposition of lead nitrate is a thermal decomposition reaction.