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प्रश्न
Name the scientists who discovered the following:
Oxygen
उत्तर
A scientist who discovered Oxygen: Joseph Priestly
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संबंधित प्रश्न
Give two examples of the following substance.
Building materials
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Explain in brief the importance of Chemistry in agriculture.
State the contributions of Antoine Lavoisier
State the contributions of John Dalton – towards the development of Chemistry.
Differentiate between the terms food preservatives and food processing with appropriate examples.
Preservatives are added to food or beverages.
Food processing is an important procedure for obtaining marketable food products.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
Select the correct name from the choices given below for the following case.
A synthetic fibre used in clothing.
