Question

82. The component of air used by the green plants which make their food is:

Answer 1

• Air is a mixture of various gases like Nitrogen $\left({\mathrm{N}}_2\right)$, Oxygen $\left({\mathrm{O}}_2\right)$, Carbon dioxide $\left({\mathrm{CO}}_2\right)$, water vapors, and a trace amount of other gases.
• Green plants make their food using Carbon dioxide $\left({\mathrm{CO}}_2\right)$, water $\left({\mathrm{H}}_2\mathrm{O}\right)$, and sunlight, thus producing carbohydrates (sugar) and releasing Oxygen $\left({\mathrm{O}}_2\right)$. This process is called photosynthesis.

Hence, the component of air used by green plants which make their food is Carbon dioxide.