Advertisements
Advertisements
प्रश्न
A philosopher’s stone is not exactly a stone.
Advertisements
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 ‘Philosopher’s stone’?
Choose the correct alternative from the choices given below for the following statement:
Trinitrotoluene is used as
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 the functions of the following basic glass apparatus:
Round bottom flask
State the function of
The asbestos fixed at the center of the wire gauze.
State the function of
The clamp mounted on the rod of a retort stand
State the method used for collecting the following gas-
Ammonia – a gas highly soluble in water and lighter than air
State the method used for collecting the following gas:
Sulphur dioxide – a gas highly soluble in water and heavier than air
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
Give a comparative difference between soaps and detergents. Give a reason. why detergents have an advantage over soap.
