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प्रश्न
How is heavy water prepared? Compare its physical properties with those of ordinary water.
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उत्तर
Heavy water can be prepared by exhaustive electrolysis of water. Comparison of physical properties of \[\ce{H2O}\] and \[\ce{D2O}\].
| Property | \[\ce{H2O}\] | \[\ce{D2O}\] | |
| (i) | Molecular mass (g mol–1) | 18.015 | 20.027 |
| (ii) | Melting point (K) | 273.0 | 276.8 |
| (iii) | Boiling point (K) | 373.0 | 374.4 |
| (iv) | Density (298 K) g cm–3 | 1.0000 | 1.1059 |
| (v) | Enthalpy of vapourisation (kJ mol–1) | 40.66 | 41.61 |
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संबंधित प्रश्न
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(A) \[\ce{Mn^{2+} -> Mn^{4+}}\]
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[Given that molar mass of H = 1 g mol−1 and O = 16 g mol−1)
