Answer: The correct answer is 1.
Step-by-step explanation:
When alkanes are reacted with chlorine gas at high temperatures or in the presence of light, it leads to the formation of chloro alkanes.
The process is known as chlorination.
Let us take the simplest alkane which is methane having chemical formula
The chemical equation for the chlorination of methane follows:
![CH_4+Cl_2\xrightarrow[]{h\\u}CH_3Cl+HCl](https://img.qammunity.org/2020/formulas/chemistry/high-school/oj0iiy9afftyt0pfy6dxt9igg5qnu7ux3y.png)
The product formed is chloromethane.
Hence, the correct answer is 1.