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Question

In the arrangement, Flask (A) contains germinating bean seeds and Flask (B) has dead boiled seeds with some antiseptic. Wet cotton provides water to both samples. A small tube containing soda lime is suspended in each flask for absorbing carbon dioxide.

What will happen when a burning paper is introduced into each flask after removing their corks?


A

The flame is immediately put off in flask A, but it continues for a short while in flask B

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B

The flame is immediately put off in flask B, but it continues for a short while in flask A

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C

The flame is immediately put off in both the flasks A and B

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D

The flame continues for a short while in both the flasks A and B

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Solution

The correct option is A

The flame is immediately put off in flask A, but it continues for a short while in flask B


The flame is immediately put off in flask A, but it continues for a short while in flask B. This proves that oxygen was absent in flask A showing thereby that it was used by the germinating seeds.


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