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CBSE Class 10 Science Question 38 of 60

Solved 2022 Term 1 Question Paper CBSE Class 10 Science — Question 14

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Question 38

Observe the diagram of an activity given below. What does it help to conclude, when the person exhales into the test-tube?

Observe the diagram of an activity given below. What does it help to conclude, when the person exhales into the test-tube? CBSE 2022 Term 1 Science Class 10 Question Paper Solved.
  1. Percentage of carbon dioxide is more in inhaled air.
  2. Fermentation occurs in the presence of oxygen.
  3. Percentage of carbon dioxide is more in exhaled air.
  4. Fermentation occurs in presence of carbon dioxide
Answer

Percentage of carbon dioxide is more in exhaled air.

Reason — Exhaling through the straw turns the lime water milky showing that percentage of carbon dioxide is more in exhaled air.