Question

Question 17
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.

Answer 1

(a) Exhalation process during respiration
(b) The lime water in test tube ‘B’ turns milky but water in tube ‘A’ remains unchanged. Because CO2 is present in the exhaled air, it mixes with lime water in ‘B’ and turns it milky.