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Question

Beena conducted an experiment in which two potato tubers were peeled and a cavity was made in each of them. One of the potato tuber was boiled while the other one was not. The cavities in both tubers were filled with distilled water and they were then placed in petri-dishes containing 1M sucrose solution. The results are shown in the given figures.

Select the correct statement regarding this experiment :

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A
Water level decreased in the cavity of boiled potato tuber due to evaporation
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B
Water level decreased in the cavity of unboiled potato tuber due to osmosis
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C
In the cavity of unboiled potato tuber no sucrose was found while in the cavity of boiled potato tuber sucrose was found
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D
All of the above
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Solution

The correct option is D All of the above

When a potato is boiled osmosis takes place. Water moves from the area of less salt to more salt, that is water will move inside the potato because of higher salt concentration.

So, when boiled and unboiled potato are kept filled with water that is distilled then the water in boiled potato tuber reduces due is evaporation the water turns into vapours whereas in unboiled potato tuber the salt concentration inside is more.

Therefore, water moves inside by osmosis. In unboiled potato, no sucrose was found as it already has a high concentration of solvent, so no exosmosis takes place, similarly in boiled potato water content is more so sucrose moves inside and exosmosis takes place.

Hence, option D is correct.


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