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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
Mention the uses of deuterium.
Explain the preparation of hydrogen using electrolysis.
Why does \[\ce{H+}\] ion always get associated with other atoms or molecules?
Hydrogen peroxide is obtained by the electrolysis of ______.
Which of the following statement(s) is/are correct in the case of heavy water?
(i) Heavy water is used as a moderator in nuclear reactor.
(ii) Heavy water is more effective as solvent than ordinary water.
(iii) Heavy water is more associated than ordinary water.
(iv) Heavy water has lower boiling point than ordinary water.
Rohan heard that instructions were given to the laboratory attendent to store a particular chemical i.e., keep it in the darkroom, add some urea in it, and keep it away from dust. This chemical acts as an oxidising as well as a reducing agent in both acidic and alkaline media. This chemical is important for use in the pollution control treatment of domestic and industrial effluents. Write the name of this compound.
Rohan heard that instructions were given to the laboratory attendent to store a particular chemical i.e., keep it in the darkroom, add some urea in it, and keep it away from dust. This chemical acts as an oxidising as well as a reducing agent in both acidic and alkaline media. This chemical is important for use in the pollution control treatment of domestic and industrial effluents. Write the name of this compound. Explain why such precautions are taken for storing this chemical.
What is the importance of heavy water?
Give a method for the manufacture of hydrogen peroxide and explain the reactions involved therein.
Hydrogen peroxide is obtained by the electrolysis of ______.
Which of the following will happen when a little hydrogen peroxide is added to a solution of ferrous sulphate?
Hydrogen peroxide for the first time was prepared by:
H2O2 can be obtained when the following reacts with H2SO4 except with:
The volume of '10 Vol' of H2O2 required to liberate 500 mL O2 at NTP is ______.
The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are ______.
In a basic medium, H2O2 exhibits which of the following reactions?
(A) \[\ce{Mn^{2+} -> Mn^{4+}}\]
(B) \[\ce{I2 -> I^-}\]
(C) \[\ce{PbS -> PbSO4}\]
Choose the most appropriate answer from the options given below.
The strength of the 11.2 volume solution of H2O2 is ______.
[Given that molar mass of H = 1 g mol−1 and O = 16 g mol−1)
