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Quarter 3

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1

Water has maximum density at:

2

George is learning about water pollution. He knows that plastics are a major pollutant in water bodies. What is a disadvantage of plastics in water?

3

Fatima is learning about methane. She understands that methane is a potent greenhouse gas. Which of the following is a natural source of methane?

4

Ethene belongs to which class?

5

Sulfur dioxide in air mainly comes from:

6

Patricia is studying water scarcity in Pakistan. She knows that inadequate water supply is a problem. What is a cause of inadequate water supply?

7

General formula of alkanes is:

8

The molecular formula of propane is:

9

Which reaction is common in alkanes?

10

George is learning about alkynes. He understands that alkynes are used in welding. Which alkyne is commonly used in oxyacetylene welding?

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