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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 :
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?
Select the correct answer from the choice given below.
The type of element-phosphorus
In the chemical word equation – Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
The molecular equation is :
Zn + H2SO4 → ZnSO4 + H2[g].
State what [g] represents.
Give the symbol of the following element:
Carbon
Give the symbol of the following element:
Nitrate
State the valency of the following metallic element and write symbol with the valency
Sodium
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).
Nitrate
______ of some elements are derived from Latin or Greek names of the elements.
What is the expansion of IUPAC.
