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Give a brief account of the discovery of air and the scientists involved.
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What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
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Describe a simple experiment with the help of a diagram to show that Air occupies space
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Describe a simple experiment with the help of a diagram to show that Air has mass
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Describe a simple experiment with the help of a diagram to show that Air exerts pressure
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Describe a simple experiment with the help of a diagram to show that Air is highly compressible
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A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
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State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
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Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
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Give two examples of the following substance.
Fuel
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Give two examples of the following substance.
Fungicides
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Give two examples of the following substance.
Medicines
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Give two examples of the following substance.
Building materials
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Give two examples of the following substance.
Chemical war weapons
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How is chemistry helpful in improving the health of human beings?
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Name the chemicals which help in increasing food production.
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What is the contribution of chemistry in following field?
Industry
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What is the contribution of chemistry in following field?
Clothing
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What is the contribution of chemistry in following field?
Cosmetics
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What is the contribution of chemistry in following field?
Medicines
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