Advertisements
Advertisements
प्रश्न
Write two reactions to explain amphoteric nature of water.
Advertisements
उत्तर
\[\ce{H2O (l) + NH3 (aq) -> OH- (aq) + NH^{+}4 (aq)}\]
\[\ce{H2O (l) + H2S (aq) -> H3O+ (aq) + HS- (aq)}\]
APPEARS IN
संबंधित प्रश्न
Describe the usefulness of water in biosphere and biological systems.
What properties of water make it useful as a solvent? What types of compound can it (i) dissolve, and (ii) hydrolyse?
Sea water is a bad conductor of electricity.
Why is the density of seawater more than that of rain water?
Why should a glass bottle completely filled with water never be kept in a freezer?
Define the following.
Freezing point
Define the following.
Boiling point
Which of the following equation depicts reducing nature of \[\ce{H2O2}\]?
Give reasons: Lakes freeze from top towards bottom.
\[\ce{H2O2}\] is a better oxidising agent than water. Explain.
Melting point, enthalpy of vapourisation and viscosity data of \[\ce{H2O}\] and \[\ce{D2O}\] is given below :
| \[\ce{H, O}\] | \[\ce{D2O}\] | |
| Melting point / K | 373.0 | 374.4 |
| Enthalpy of vapourisation at (373 K)/kJ mol–1 | 40.66 | 41.61 |
| Viscosity/centipoise | 0.8903 | 1.107 |
On the basis of this data explain in which of these liquids intermolecular forces are stronger?
Explain why \[\ce{HCl}\] is a gas and \[\ce{HF}\] is a liquid.
Why does water show high boiling point as compared to hydrogen sulphide? Give reasons for your answer.
______ has the highest latent heat of fusion.
One gram of water requires ______ of heat to raise its temperature by l°C.
Water is circulated around the car engine using the ______ pump and the heat is absorbed.
Which of the following ion is responsible for the temporary hardness of water?
