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प्रश्न
Write True or False against the following statement.
Gunpowder is an insecticide:
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
What kind of experiments did Alchemists do?
What is ‘Philosopher’s stone’?
Name six such products, which we use daily.
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
Match the following scientists in column A with their discoveries or contributions in column B.
| Column A | Column B | ||
| (a) | Marie Curie | (i) | Safety Lamp |
| (b) | John dalton | (ii) | Helium |
| (c) | William Ramsey | (iii) | Nobel Prize Winner (two times) |
| (d) | Sir Humphry Davy | (iv) | Atomic Theory |
State the functions of the following basic glass apparatus:
Beaker
State the function of
The asbestos fixed at the center of the wire gauze.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A long glass tube with a broad inlet at the top, which allows entry of the reactants into the round bottom flask, during laboratory preparations of gases.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A modern apparatus with an air regulator, used for heating purposes.
Give reasons for the following
Alchemy was considered a pseudoscience.
