Question 8
Which of the following raw material is available in the air for photosynthesis?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Hydrogen

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Solution

The answer is option (b).

All these gasses are present in the air but only carbon dioxide is needed for photosynthesis. Photosynthesis is the process by which green plants prepare food from carbon dioxide and water in the presence of sunlight and chlorophyll. The prepared food is carbohydrate, which is stored as starch. Oxygen is also produced as a byproduct. The equation showing the process of photosynthesis is as follows:

Carbon dioxide + Water $S u n l i g h t, C h l o r o p h y l l - ------------ \to$ Carbohydrate + Oxygen

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Similar questions

Question 8
Which of the following raw material is available in the air for photosynthesis?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Hydrogen

Question 15
Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials.

(a) Available in the plant : ___

(b) Available in the soil : ___, ___

(d) Available during day :___

Q. The gas given out in photosynthesis is
(a) nitrogen.
(b) carbon dioxide.
(c) oxygen.
(d) hydrogen.

Q. Which of the following gets absorbed from the atmosphere during photosynthesis?

(a) oxygen
(b) water vapour
(c) carbon dioxide
(d) nitrogen

Q. Which of the following represents photosynthesis?
(a) water + oxygen----> carbon dioxide + carbohydrate
(b) carbon dioxide + water---->oxygen + carbohydrate
(c) carbohydrate + oxygen---> water + oxygen
(d) carbon dioxide + oxygen---> water + carbohydrate

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