Advertisements
Advertisements
Question
Arrange the following:
CaH2, BeH2 and TiH2 in order of increasing electrical conductance.
Solution
The electrical conductance of a molecule depends upon its ionic or covalent nature. Ionic compounds conduct, whereas covalent compounds do not.
BeH2 is a covalent hydride. Hence, it does not conduct. CaH2 is an ionic hydride, which conducts electricity in the molten state. Titanium hydride, TiH2 is metallic in nature and conducts electricity at room temperature. Hence, the increasing order of electrical conductance is as follows:
BeH2 < CaH2 < TiH2
APPEARS IN
RELATED QUESTIONS
Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?
Why is it said that-
There is no alternative to water for cleaning purposes.
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.
Boiling point
Which of the following equations depict the oxidising nature of \[\ce{H2O2}\]?
If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquid water?
\[\ce{H2O2}\] 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.
Freezing of water will cause an ______ is the volume.
______ has the highest latent heat of fusion.
Water is circulated around the car engine using the ______ pump and the heat is absorbed.
What is the taste of distilled water & boiled water?
