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प्रश्न
Define: Compounds
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उत्तर
Compounds : A compound is a pure substance formed by the chemical combination of two or more elements in a fixed ratio by mass.
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संबंधित प्रश्न
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
What do the following symbol stand for?
2H
Give the symbol and the number of atoms of the following elements present in carbon dioxide.
State the type of element for the following:
Arsenic
State what is meant by the term ‘activity series of metals’.
Give the symbol of the following element:
Hydroxide
Select the correct answer from the choice in the bracket.
The formula of caustic soda.
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).
Plumbite
Name three metals whose symbols are derived: from their Latin names.
State why the molecular formula of zinc carbonate is ZnCO3 .
