Question

Account for the following :

(a) H₃PO₄ is preferred to H₂SO₄ in preparation of H₂O₂ from BaO₂.8H₂O 

(b) Water is responsible for moderation of the climate and the body temperature of living beings 

(c) Melting point of D₂O is higher than normal water .

Answer 1

a) Because H₃PO₄ act as negative catalyst and prevent the decomposition of H₂O₂ 

b) Water has high heat of vapourisation and freezing due to hydrogen bond 

c) Deuterium is larger than hydrogen and hence strong hydrogen bonding