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Name the scientists who discovered the following:
Atoms
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Name the scientists who discovered the following:
Oxygen
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Name the scientists who discovered the following:
Safety lamp
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Name the scientists who discovered the following:
Elements
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_____________ help to increase the production of food.
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Food items like jams and pickles are protected by using ___________.
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Fill in the blank:
L.P.G. is used for ___________
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Fill in the blank:
Inert gases were discovered by ___________
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Write True or False against the following statement.
Antibiotics are used as preservatives:
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Write True or False against the following statement.
D.D.T. is an important fertiliser:
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Choose the correct alternative from the choices given below for the following statement:
Mortar is used as a
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Choose the correct alternative from the choices given below for the following statement:
The chemicals prescribed by a doctor in the treatment of infectious diseases are called
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Explain in brief the importance of Chemistry in agriculture.
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Explain in brief the importance of Chemistry in the production of various products.
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State the contributions of Dimitri Mendeleev
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State the contributions of Antoine Lavoisier
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State the contributions of John Dalton – towards the development of Chemistry.
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Give two examples of the following substance.
Food preservatives
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Differentiate between the terms food preservatives and food processing with appropriate examples.
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Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
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