Question

An experimental set-up to demonstrate respiration in germinating seeds is shown here. It is observed that water from the beaker has not risen into the delivery tube (bent tube). This is because :



(1) the set-up is airtight
(2) the beaker has coloured water
(3) carbon dioxide is not being absorbed
(4) no oxygen is available to seeds for respiration

Answer 1

In the above experiment, it is observed that water from the beaker has not risen into the delivery tube which means that carbon dioxide is not being absorbed.
In the small tube, KCl is present instead of KOH which is required for absorbing CO₂ and creating partial vacuum.

Hence, the correct answer is option 3.