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प्रश्न
What is ‘Philosopher’s stone’?
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उत्तर
The goal of alchemy was to find a mythical and magical substance called “philosopher’s stone” not a literal stone but wax, liquid or powder with magical power, which on heating with a base, iron and copper metals would turn into gold, the purest form of matter which would bring wealth, health and immortality.
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संबंधित प्रश्न
Match the following words in column A with those in column B:
| Column A | Column B | ||
| (a) | Clothing | (i) | toothpaste, cosmetics |
| (b) | Green Revolution | (ii) | nylon, wool |
| (c) | Building Material | (iii) | agriculture |
| (d) | Commodities of daily | (iv) | mortar, cement |
State the functions of the following basic glass apparatus:
Beaker
State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.
State the function of
The clamp mounted on the rod of a retort stand
State the function of
The air regulator in a Bunsen burner.
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
Select the correct name from the choices given below for the following case.
The scientist who formulated the Periodic Table.
Select the correct name from the choices given below for the following case.
Predecessors to the modern Chemist who created the ‘Philosopher's stone’.
Select the correct name from the choices given below for the following case.
A water-soluble cleaning agent – not inactivated by hard water.
Give reasons for the following
Alchemy was considered a pseudoscience.
