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प्रश्न
State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.
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उत्तर
Round bottom flask is preferred to flat bottom flask because in the round bottom flask heat is uniformly distributed throughout on heating.
संबंधित प्रश्न
___________ deals with the study of matter and the changes it undergoes.
Write True or False against the following statement.
Chemistry plays an important role in the national economy:
Choose the correct alternative from the choices given below for the following statement:
Used is an important
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 |
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A modern apparatus with an air regulator, used for heating purposes.
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Alchemy was considered a pseudoscience.
