Question

Q1. Which chemical is there in test tube A?


Q2. What happens when air is passed through test tube A?


Q3. Which chemical is present in test tube B?


Q4. What happens when air passes through test tube B?


Q5. When will lime water turns milky?


Q6. What happens when air passes through the jar containing germinating seeds?



Q7. What happens when the air passes through the test tube C?



Q8. What conclusion do you draw after conducting Activity1?



Thank you!

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Answer 1

Answer:

1 ) Test tube A contains potassium hydroxide solution

2) potassium hydroxide solution absorbs carbon dioxide from incoming air.

3) lime water or we can say calcium hydroxide is present in test tube B

4) When exhaled air is blown through Lime Water which is also known as calcium hydroxide, the carbon dioxide present in the exhaled air reacts with the Lime water and turns it into a milky solution, since the the CO2 reacts with Ca(OH)2 and forms CaCO or Calcium Carbonate, which is insoluble and white in colour.

5) when carbon dioxide passes through lime water, it turns milky

6) As the seeds respire, they are taking in oxygen and respiring out carbon dioxide, but the carbon dioxide is absorbed by the calcium hydroxide. As a result, the amount of air in the sealed test tube actually decreases and water rises in the test tube

7) When exhaled air is blown through Lime Water which is also known as calcium hydroxide, the carbon dioxide present in the exhaled air reacts with the Lime water and turns it into a milky solution, since the the CO2 reacts with Ca(OH)2 and forms CaCO or Calcium Carbonate, which is insoluble and white in colour.

hope it helps you

Explanation:

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