1.1. Describe how the carbon-carbon triple bond forms in propyne, CH₃C≡CH. Refer to orbital overlap and hybridisation in your answer.

1.2. Fig. 3.1 shows the structure of an organic molecule.

Fig. 3.1

State the number of carbon atoms that are sp² hybridised in this molecule.

1.3. Table 3.1 shows three nitrogen-containing species. Complete Table 3.1 to state the hybridisation of the nitrogen atom in each species.

Table 3.1