Question

Arrange the following ions in the order of decreasing X – O
bond length, where X is the central atom in
(a) ClO₄⁻ ,SO₄²⁻ ,PO₄³⁻ ,SiO₄⁻ - - - -
(b) SiO₄⁴⁻ ,PO₄³⁻ ,SO₄²⁻ ,ClO₄⁻ - - - -
(c) SiO₄⁴⁻ ,PO₄³⁻ ,ClO₄⁻ ,SO₄²⁻ - - - -
(d) SiO₄⁴⁻ ,SO₄²⁻ ,PO₄³⁻ ,ClO₄⁻

Answer 1

The correct order of bond length is

Explanation:

• The length of a covalent bond depends on the bond order of the elements.

• The bond order is defined as the half of difference of electrons in bonding orbital and antibonding orbital.

• Here, four species are given which are SiO₄4⁻, PO₄³⁻, SO₄²⁻and ClO₄⁻.

• In SiO₄4⁻, the bond order of silicon and oxygen is 1.

• In PO₄³⁻, the bond order is 1.25.

• In SO₄²⁻, the bond order is 1.5.

• In ClO₄⁻, the bond order is 3.5.

• So,the trend of bond length is SiO₄⁴⁻ ,PO₄³⁻ ,SO₄²⁻ ,ClO₄⁻.

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Answer 2

Answer:

the answer is option-B , hope it helps you