Long answer III — task. Science CBSE, Class 7.

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Observe figure carefully and answer the following questions.

1. Which process is being tested in the activity?

This exercise tests the amount of carbon dioxide released after exhaling.
This exercise tests the amount of oxygen released after inhaling.
This exercise tests the amount of oxygen released after exhaling.

2. What is the result of the activity? Give reasons.

Test tube ‘B’ lime water turns milky, while tube ‘A’ remains unaltered. Exhaled carbondioxide interacts with lime water in test tube ‘B’ to make it milky.
Test tube ‘A’ lime water turns milky, while tube ‘A’ remains unaltered. Exhaled carbondioxide interacts with lime water in test tube ‘A’ to make it milky.
Test tube ‘B’ lime water turns milky, while tube ‘A & B’ remains unaltered. Exhaled carbondioxide interacts with lime water in test tube ‘A’ to make it milky.

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