Q2 of 53 Page 1

What is the important function of presence of ozone in earth’s atmosphere?

Ozone layer plays an important role in Earth’s atmosphere as it absorbs the harmful UV radiation of the sunlight and is important for survival on Earth. Q.3. Write the electron dot structure of ethane molecule, C2H6.


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9

What is an ‘esterification’ reaction? Describe an activity to show esterification.

 1

What are the various steps in a food chain called?

 3

Write the electron dot structure of ethane molecule, C2H6.

 4

What makes the earths atmosphere a heterogeneous mixture?