Question

What is the use of the following in the experiments on respiration?
(i) Soda lime
(ii) Lime water

Answer 1

The oxidation of organic food, primarily carbohydrates, in living cells for the release of energy is known as respiration. Photosynthesis and respiration are diametrically opposed. Respiration consumes oxygen while emitting carbon dioxide. Photosynthesis converts carbon dioxide to oxygen. Experiments demonstrating the generation of carbon dioxide and heat, as well as the consumption of oxygen, can be used to study this.

Complete answer:
A: Soda Lime – To absorb any $C{O_2}$ emitted by the seeds.
B: Limewater - A change in colour from lime water to milky water shows the presence of carbon dioxide, with developing seeds as the only source.
Carbon dioxide can be detected using limewater. When carbon dioxide is bubbled into limewater, the colour changes from clear to cloudy/milky. This is why a simple respirometer using limewater may demonstrate that exhaled air contains more carbon dioxide than intake air. Soda lime is a granular mixture of $NaOH$ and $CaO$ chemicals used to remove carbon dioxide from breathing gases in confined breathing conditions such as general anaesthesia, submarines, rebreathers, and recompression chambers to prevent $C{O_2}$ retention and poisoning.

Additional information:
There are two types of respiration:
Because aerobic respiration occurs in the presence of oxygen, it causes complete glucose oxidation and energy release. Krebs cycle, ETS, and Glycolysis are three steps in the Krebs cycle.
Anaerobic respiration occurs when food is oxidised in an oxygen-depleted environment. Incomplete glucose oxidation releases less energy.

Note:
Respiration is one of the most basic and essential life processes carried out by living things. Complex organic molecules are broken down into smaller molecules in a catabolic process. Respiration is a process that releases energy in the absence or presence of oxygen.