Consider the following organic compounds :

(i) $H-C(H)(H)-C(H)(H)-C(H)=O$

(ii) $H-C(H)(H)-C(H)=O

(a) Name the functional group present in their compounds.

(b) Write the general formula for the compounds of this functional group.

(c) State the relationship between these compounds and draw the structure of any other compound having similar functional group.

(a) Electron dot structure for ethyne ($C_2H_2$):

In ethyne, there is a triple covalent bond between the two carbon atoms and a single covalent bond between each carbon and hydrogen atom.

$$\text{H} \bullet \times \text{C} \begin{matrix} \bullet \times \\ \bullet \times \\ \bullet \times \end{matrix} \text{C} \times \bullet \text{H}$$

``molecule {"smiles": "C#C", "caption": "Ethyne (C2H2)"} ``

(b) Differences between covalent and ionic compounds: