Observe Figure 10.2 carefully and answer the following questions.
(a) Which process is being tested in the activity?
(b) What is the result of the activity? Give reasons.
a) As the air is being released from the nose, the process of exhalation is being tested here.
b) In the first case i.e. test tube A only water is present in the test tube so even if CO2 is exhaled out no chemical reaction will happen but in the second case when lime water is present in the test tube and CO2 enters it, CO2 reacts with lime water (calcium hydroxide) and produce calcium carbonate which is milky in appearance.
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