Amongst baking soda, caustic soda and washing soda, carbonate anion is present in :

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

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

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 :