Question 37
If a potted plant is covered with a glass jar, water vapour appear on the wall of glass jar. Explain why?

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Solution

Water vapour appearing on the wall of glass jar is due to the phenomenon of transpiration. The leaves lose water in the form of vapour through its stomatal aperture during transpiration which condenses on the wall of glass jar.

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Reva carried out an experiment, she took a watered potted plant and placed it on a sheet of glass and covered it with a bell jar. The edge of the bell jar is sealed with vaseline to make it airtight.The whole apparatus is then placed in a sunny place for an hour or two.After a couple of hours, she observed that the inner walls of the bell jar get accumulated with drops of moisture.What does this signify?

Reva carried out an experiment, she took a watered potted plant and placed it on a sheet of glass and covered it with a bell jar. The edge of the bell jar is sealed with vaseline to make it airtight.The whole apparatus is then placed in a sunny place for an hour or two.What are the observations made by Reva at the end of this experiment?

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Transpiration

Standard IX Biology

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Question 37 If a potted plant is covered with a glass jar, water vapour appear on the wall of glass jar. Explain why?

Water vapour appearing on the wall of glass jar is due to the phenomenon of transpiration. The leaves lose water in the form of vapour through its stomatal aperture during transpiration which condenses on the wall of glass jar.

Question 37
If a potted plant is covered with a glass jar, water vapour appear on the wall of glass jar. Explain why?