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प्रश्न
State the function of
The air regulator in a Bunsen burner.
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उत्तर
The air regulator has holes and is used for regulating the flame.
संबंधित प्रश्न
What is alchemy?
What is the contribution of chemistry in the following field?
National Defence
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
Choose the correct alternative from the choices given below for the following statement:
Trinitrotoluene is used as
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 method used for collecting the following gas-
Ammonia – a gas highly soluble in water and lighter than air
State what are – ‘stain removals’. Name three important stain removers & give their prime functions.
Select the correct name from the choices given below for the following case.
The scientist who formulated the Periodic Table.
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.
