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प्रश्न
A philosopher’s stone is not exactly a stone.
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
How is the knowledge of chemistry important to mankind?
Who is known as the Father of chemistry? Why?
___________ deals with the study of matter and the changes it undergoes.
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.
State the method used for collecting the following gas-
Ammonia – a gas highly soluble in water and lighter than air
Select the correct name from the choices given below for the following case.
A synthetic fiber used in clothing.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
For gas preparations where heating is required.
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 rectangular mesh with asbestos at its centre kept for initiating even distribution of heat to the bottom of the apparatus.
