Which type of orbitals overlap to form the sigma bond between C and N in H−C≡N:? Which type of orbitals overlap to form the sigma bond between and in ?

Explanation:

When carbon atom tends to form single bonds then its hybridization is , when carbon atom tends to form double bond then its hybridization is and when a carbon atom is attached to a triple bond or with two double bonds then its hydridization is sp.

For example, in HCN molecule there is a triple existing between the carbon and nitrogen atom.

So, hybridization of carbon in this molecules is sp. Moreover, nitrogen atom is also attached via triple bond and it also has a lone pair of electrons. Hence, the hybridization of nitrogen atom is also sp.

Thus, we can conclude that s and p type of orbitals overlap to form the sigma bond between C and N in H−C≡N:

In this experiment, the cup of steaming hot water directly emits a large amount of water vapour which had condensed on the roof of the freezer. These water vapour molecules had condensed to such an extent that they became solidified, i.e; Ice.

Explanation:

According to the particle theory:

The higher the temperature, The lower the Intermolecular attraction and vice versa.

These means the low temperature of the Freezer in which the hot cup of water was kept had increased the intensity of the intermolecular attraction between the water vapour molecules