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Question

(Answer 10, 11, 12, 13, 14, and 15 on the basis of the following given data)
A Hydrilla plant is kept in a beaker containing water. It is converted with an inverted glass funnel and a test tube. The whole experiment is put in sunlight. It is found that the level of water is coming down and gas accumulates at the upper end of the test tube. The whole experiment is conducted in red, blue, and green light. After some time some amount of sodium bicarbonate is added to the beaker. Will these modifications affect the experiments in any way?

Which is the gas accumulating in the test tube?


A

Carbon dioxide

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B

Oxygen

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C

Nitrogen

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D

Ozone

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Solution

The correct option is B

Oxygen


The correct option is B.

The explanation for the correct option:

  1. Photosynthesis is the process by which leaves synthesize their own complex food with the help of chlorophyll (photosynthetic green pigment on leaves) in the presence of sunlight using carbon dioxide and water.
  2. During this process, oxygen is one of the by-products that is released, this is used to sustain life on earth.

The explanation for incorrect options:

Option A:

  1. During photosynthesis, the inorganic raw materials used are carbon dioxide and water.
  2. Carbon dioxide is fixed by rubisco to glucose.

Option C:

  1. Nitrogen is required by the plants in a large quantity for various metabolic processes metabolic.
  2. It is a macronutrient for plant growth.

Option D:
Ozone is composed of 3 oxygen atoms, it is present in the stratosphere.

Final answer: Oxygen is the gas that is accumulating in the test tube.


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