Why is the 2nd statement wrong? Please explain this assertion-reason question in detail.
Dear Student,
Acidity has no relation with number of N-O bonds.
Greater the oxidation number of central metl atom, greater is its acidity because the higher the oxidation number, the higher the attraction of electrons and the stronger the covalent bond between N and O. This tends to weaken the O-H bond and so the release of H+ becomes easy.
Oxidation number of N in HNO3 is +5 whereas in HNO2 it is +3 i.e. oxidation number of N in HNO3 is greater than HNO2. Hence, HNO3 is a stronger acid than HNO2.
Acidity has no relation with number of N-O bonds.
Greater the oxidation number of central metl atom, greater is its acidity because the higher the oxidation number, the higher the attraction of electrons and the stronger the covalent bond between N and O. This tends to weaken the O-H bond and so the release of H+ becomes easy.
Oxidation number of N in HNO3 is +5 whereas in HNO2 it is +3 i.e. oxidation number of N in HNO3 is greater than HNO2. Hence, HNO3 is a stronger acid than HNO2.