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प्रश्न
Explain the terms 'valency' and 'variable valency'.
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उत्तर
Valency: The number of electrons that an atom can lose, gain or share during a chemical reaction is called its valency.
Variable valency: Certain elements exhibit more than one valency, i.e. they show variable valency.
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संबंधित प्रश्न
Give two examples of the following :
Solid + Solid mixture
Name the element used as a standard for atomic mass scale.
Give two examples of the following:
Liquid + Liquid mixture:
State what a chemical formula denotes.
Write the radical of the following valency:
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Write the chemical formula of the following:
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State the valency of the following metallic element and write symbol with the valency
Potassium
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).
Permanganate
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).
Dichromate
What does the symbol '(aq.)' present in a chemical equation, mean?
