Given below are two statements.

$$\bullet$$ Statement I : In CuSO₄ . 5H₂O, Cu-O bonds are present.

$$\bullet$$ Statement II : In CuSO₄ . 5H₂O, ligands coordinating with Cu(II) ion are O-and S-based ligands.

In the light of the above statements, choose the correct answer from the options given below.

Number of lone pair(s) of electrons on central atom and the shape BrF₃ molecule respectively, are

Sulphur dioxide is one of the components of polluted air. SO₂ is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO₂ is :

Which of the following carbocations is most stable?