How can D2O be prepared from water? Mention the physical properties in which D2O differs from H2O.Give at least three reactions of D2O showing the exchange of hydrogen with deuterium.
(i) D2O can be prepared by prolonged electrolysis of water.
(ii) Physical properties
(a) D2O is colourless, odourless, tasteless liquid. It has maximum density at (Maximum density of water at ).
(b) Solubility of salts in heavy water is less than in ordinary water because it is more viscous than ordinary water.
(c) Nearly, all physical constants of D2O are higher than H2O. It is due to the greater nuclear mass of deuterium atom than H-atom and stronger H-bonding in D2O than H2O.
(iii) Exchange reactions of hydrogen with deuterium
