Question

ch₃ - ch = ch - ch₃ + h₂ →

Explanation:

Step1: Analyze the reaction type

This is an addition reaction of an alkene with hydrogen (hydrogenation).

Step2: Write the reaction equation

$$\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}+\mathrm{H}_{2}\xrightarrow{\text{ catalyst }}\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$$

Answer:

$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$$