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?

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

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

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

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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 will put off in flask A. At the same time, the flame will glow for a short while in flask B. This is happening due to the absence of oxygen in flask A showing that, it was used by the germinating seeds.

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Similar questions

Q. Why is some KOH placed in a small test tube in the flask with germinating seeds in the experiment to demonstrate occurrence of respiration in germinating seeds?
(1) To provide oxygen required by the seeds for respiration.
(2) To absorb carbon dioxide and create partial vacuum in the flask.
(3) To absorb water from the seeds to make them dry.
(4) To make the air present in the flask alkaline.

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

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