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प्रश्न
Name the scientists who discovered the following:
Oxygen
उत्तर
A scientist who discovered Oxygen: Joseph Priestly
APPEARS IN
संबंधित प्रश्न
Give two examples of the following substance.
Food preservatives
Give two examples of the following substance.
Fungicides
Name the chemicals which help in increasing food production.
Fill in the blank:
L.P.G. is used for ___________
Write True or False against the following statement.
Antibiotics are used as preservatives:
State the contributions of Antoine Lavoisier
State the contributions of John Dalton – towards the development of Chemistry.
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
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.
