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प्रश्न
Define Alchemy.
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उत्तर
Alchemy was a form of chemistry studied in the middle age, which was concerned with trying to discover ways to change ordinary metals into gold.
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संबंधित प्रश्न
The symbol of a metal element which is used in making thermometers is :
The English name of an element is potassium, its Latin name will be :
In the chemical word equation –
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen.
State the reactants and products of the above reaction. What does the arrow indicate?
Give the symbol of the following element:
Iodine
Write the radical of the following valency:
magnesium
Write the radical of the following valency:
Sulphur [Sulphide]
Give a reason – Magnesium [2, 8, 2] has valency 2+.
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bisulphate
What does the symbol '(aq.)' present in a chemical equation, mean?
Antimony has the highest tensile strength.
