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Introduction

Valency of an...

Question

Valency of an element is fixed whereas oxidation number may be different.
Is the above statement true or false?

A

True

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B

False

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Solution

The correct option is A True
Valency is defined as number of valence electrons in a neutral atom whereas oxidation number is defined as the oxidation state( due to electronegativity difference) of that atom in molecule (after gaining or losing $e^{-} .$ Hence valency of an atom is fixed whereas oxidation number may vary from compound to compound.

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Similar questions

Q. Why do some elements like carbon have different oxidation states in different elements whereas some elements like oxygen have a fixed oxidation number?

Valency and oxidation number are different for an element. Valency of carbon is generally

4

, however, the oxidation state may be

- 4, - 2, 0, + 2, - 1

, etc. In the compounds containing carbon, hydrogen and oxygen, the oxidation number of carbon can be calculated as: Oxidation number of carbon

= \frac{2 n_{O} - n_{H}}{n_{C}}

n_{H}, n_{O}

n_{C}

are number of respective atoms.

In which of the following compounds, the valency of carbon is two?

Valency and oxidation state of an element is same - True or False?

Q. Assertion :Oxidation number of an element can be a whole number, zero or a fractional number. But valency can never be zero. Reason: Valency of inert gases is zero.

Q. Assertion :Oxidation number of an element can be a whole number, zero or a fractional number. Reason: Valency of inert gases is zero.

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