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Answer : The oxidation number of chlorine (Cl) is, (+1)

Explanation :

Oxidation number : It represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with the sign (+) and (-) first and then the magnitude.

When the atoms are present in their elemental state then the oxidation number will be zero.

Rules for Oxidation Numbers :

The oxidation number of a free element is always zero.

The oxidation number of a monatomic ion equals the charge of the ion.

The oxidation number of  Hydrogen (H)  is +1, but it is -1 in when combined with less electronegative elements.

The oxidation number of  oxygen (O)  in compounds is usually -2, but it is -1 in peroxides.

The oxidation number of a Group 1 element in a compound is +1.

The oxidation number of a Group 2 element in a compound is +2.

The oxidation number of a Group 17 element in a binary compound is -1.

The sum of the oxidation numbers of all of the atoms in a neutral compound is zero.

The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

The given compound is, [tex]ClO^-[/tex]

Let the oxidation state of 'Cl' be, 'x'

[tex]x+(-2)=-1\\\\x-2=-1\\\\x=+1[/tex]

Therefore, the oxidation number of chlorine (Cl) is, (+1)

Thee oxidation number of cl− in the hypochlorite ion clo− is; +1.

Definition:

The Oxidation number represents the number of electrons which are either lost or gained by the atoms of an element in a compound.

  • Oxidation numbers are written with the sign (+) and (-) first as the case may be and then the magnitude

  • However, the oxidation number of a neutral atom is 0.

Among the Rules for Oxidation Numbers is the Oxygen rule which states that:

  • The oxidation number of oxygen (O) in compounds is usually -2, but it is -1 in peroxides.

In essence, since the given formula is that of hypochlorite ion, ClO-

Let the oxidation number of Chlorine = x

Therefore;

  • x + (-2) = -1
  • x = -1 + 2
  • x = 1.

Ultimately, the oxidation number of cl− in the hypochlorite ion clo− is; +1.

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