Question

describing experiment to prove that air is necessary for germination ​

Answer 1

$\huge\mathcal{Aim}$

To prove that oxygen is necessary for germination.

$\huge\mathcal{Apparatus}$

Two conical flask marked A and B, seeds of pea, water, cotton wool, pyrogallic acid, test tubes.

$\huge\mathcal{observation}$

The seeds in flask A germinate because of presence of oxygen and seeds in flask B do not germinate because pyrogallic acid absorbs oxygen.