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 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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Similar questions

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?

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.

Q. The apparatus required to perform the experiment to show the evolution of carbon dioxide during respiration includes:

(1) flat-bottom flask,rubber cork , small glass tube, water,KOH solution,delivery tube ,germinating seeds,thread,vaseline, small beaker

(2) round-bottom flask,rubber cork, boiling tube,water,NaOH solution, delivery tube ,dry seeds, thread, vaseline, small beaker

(3) measuring-flask, rubber cork,small glass tube,water,Na₂CO₃solution,delivery tube,germinating seeds, thread,vaseline,small beaker

(4) flat-bottom flask, rubber cork, small glass tube,water,KOH solution, delivery tube, dry seeds,thread, vaseline,small beaker

Q. is suspended in each flask for absorbing carbon dioxide released from the seeds.

What will you observe when you place a small animal such as a live cockroach in one flask (A) and a dead cockroach in the other flask (B) where both flasks are fitted with a rubber cork and left for few hours, after that introduced with small burning candle into each flask and mouths are closed immediately as shown in the figure.

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