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The diagram below show an experimental set up to investigate a certain physiological process in plants.

(a) State the aim of the experiment.
(b) State the role of the following in the experiment.
(i) Potassium hydroxide
(ii) Aluminium foil.
(c) Account for the expected colour change in the tube F.

Answer Text:
a)- Aerobic respiration
b) i)Absorbs #CO_2# in the air sucked in.
ii)- Block light from reaching the plant,
preventing process of photosynthesis which produces oxygen as a by product.
c)- Remains colourless, carbon (IV) oxide in atmospheric air has been absorbed by potassium hydroxide.