The bond order of gas C is :- | TestHub

Passage / Comprehension

On reacting an aqueous salt A with H₂S in an acidic medium, a brownish-black precipitate (B) is formed. This precipitate is not soluble in YAS, but upon treatment with dilute HNO₃, it dissolves and forms a white precipitate (D) with the evolution of a gas C.

The bond order of gas C is :-

Options:

Answer:

Solution:

The brownish-black precipitate (B) is a metal sulfide (such as Bi₂S₃ or CuS) that reacts with dilute HNO₃ to form elemental sulfur (white precipitate D) and nitric oxide gas (C). The general reaction is:

$3 MS + 8 H N O_{3} \to 3 M (N O_{3})_{2} + 2 NO ↑ + 3 S ↓ + 4 H_{2} O$

Gas (C) is Nitric Oxide (NO), which has a total of 15 electrons. According to Molecular Orbital Theory (MOT), the bond order for NO is calculated as:

$\frac{10 ( b o n d in g e ^{-} ) - 5 ( an t ib o n d in g e ^{-} )}{2} = 2.5$

The correct option is (B).

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Options:

Doubts & Discussion