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प्रश्न
A philosopher’s stone is not exactly a stone.
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उत्तर
Philosopher’s stone is a legendary substance, capable of turning inexpensive metals like lead or mercury into – gold and silver. (It was not literally a stone, but a powder or potion).
संबंधित प्रश्न
What is science?
Name six such products, which we use daily.
How is the knowledge of chemistry important to mankind?
Write True or False against the following statement.
Gunpowder is an insecticide:
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 air regulator in a Bunsen burner.
State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.
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 glass apparatus that measures liquid by sucking the liquid at one end up to the marked level and later pouring it out.
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.
