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प्रश्न
State the method used for collecting the following gas:
Sulphur dioxide – a gas highly soluble in water and heavier than air
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उत्तर
The method used for collecting SO2 is an upward displacement of air. This method is used for gases like SO2 which is soluble in water and heavier than air.
संबंधित प्रश्न
What is the contribution of chemistry in the following field?
National Defence
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 what is Science and give the basic bifurcation of Science with reasons.
State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
Select the correct name from the choices given below for the following case.
A substance which absorbs moisture and keeps the skin dry and free from rashes.
Select the correct name from the choices given below for the following case.
A chemical used as a preservative for jams, pickles, etc.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A glass apparatus resistant to chemicals, made of pyrex, and used for heating specific liquids.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A metallic apparatus which supports the wire gauze.
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.
