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प्रश्न
Name the scientists who discovered the following:
Oxygen
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उत्तर
A scientist who discovered Oxygen: Joseph Priestly
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संबंधित प्रश्न
What is the contribution of chemistry in following field?
Clothing
Name the scientists who discovered the following:
Safety lamp
_____________ help to increase the production of food.
Fill in the blank:
Inert gases were discovered by ___________
Explain in brief the importance of Chemistry in the production of various products.
Differentiate between the terms food preservatives and food processing with appropriate examples.
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
Differentiate between natural fibres & synthetic fibres.
Preservatives are added to food or beverages.
Give reasons for the following
Ordinary soap is wasted in hard water.
