Give one example of the compound having alkyne functional group. (Ethane / Ethene / Ethyne)

Give one word or a phrase for the following statement:

• The chemical bond formed by a shared pair of electrons each bonding atom contributing one electron to the pair.

Draw the electron dot diagram for the compound given below. Represent the electrons by (.) and (x) in the diagram.

• Chlorine molecule [Atomic No.$\mathrm{Cl}=17$]

Give the appropriate term defined by the statement given below:

The covalent bond in which the electrons are shared equally between the combining atoms.

Draw the electron dot diagram for the compound given below. Represent the electrons by (.) and (x) in the diagram.

• Water molecule [Atomic No. of $\mathrm{H}=1, \mathrm{O}=8$]