`H_(2)O_(2)` and heavy water was discovered by respectively :

Heavy water was discovered by Urey.

H_2O_2 and heavy water were discovered respectively by

H_(2) and O_(2) are kept in mass ratio 1:8 respectively at 6 atm. If small orifice is made then relative rate of effusion of H_(2) with respect to O_(2) initially is :

Heavy water ( D_2O) is :

18g of ice is converted into water at 0^(@)C and 1 atm. The entropies of H_(2)O (s) and H_(2)O (l) are 38.2 and 60J/mol K respectively. The enthalpy cange for this conversion is:

The oxidation number of sulphur in H_(2)SO_(4),H_(2)S_(2)O_(4) and H_(2)S_(2)O_(6) are respectively

Statement about heavy water are given below . A. Heavy water is used in exchange reactions for the study of reaction mechanisms. B. Heavy water is prepared by exhaustive electrolysis of water C. Heavy water has higher boiling point than ordinary water. D. Viscosity of H_2 O is greater than D_2 O