Chemistry - CHEMICAL BONDING Question with Solution | TestHub
Acids are normally classified in two groups, hydra acid and oxy acids.
* Hydra acids are acids which contain hydrogen and a non metal, but no oxygen.
* Oxy acids are acids which contain hydrogen, oxygen and a metal or non-metal in which –OH group is directly connected with non-metal.
How many of the following species, in which central atom having zero lone pair, bonded with at least two - bond (i) Sodium perchlorate (ii) (iii) Sulphur trioxide (iv) Sulphur dioxide (v) Marshall's acid (vi) Oleum (vii) Sulphurous acid (viii) Sodium chlorate
Answer:
Solution:
The question asks to identify species where the central atom has zero lone pairs and forms at least two bonds.
(i) Sodium perchlorate (ClO₄⁻): Central Cl has 0 lone pairs, forms four bonds.
(ii) N₂O₅: Central N has 0 lone pairs, forms one bond.
(iii) Sulphur trioxide (SO₃): Central S has 0 lone pairs, forms three bonds. (iv) Sulphur dioxide (SO₂): Central S has 1 lone pair.
(v) Marshall's acid (H₂S₂O₈): Central S has 0 lone pairs, forms two bonds.
(vi) Oleum (H₂S₂O₇): Central S has 0 lone pairs, forms two bonds. (vii) Sulphurous acid (H₂SO₃): Central S has 1 lone pair. (viii) Sodium chlorate (ClO₃⁻): Central Cl has 1 lone pair.
Species satisfying the conditions are (i), (iii), (v), (vi). Thus, there are 4 such species.
