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Micronutrients

Chlorophyll, ...

Question

Chlorophyll, the green colouring matter in plants helps the process of photosynthesis by:

A

acting as a catalyst

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B

converting soil into carbohydrates

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C

reacting with carbon dioxide

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D

fixing soil nitrogen

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Solution

The correct option is A acting as a catalyst
Chlorophyll plays a vital role by absorbing sunlight of a range of wavelengths, primarily blue and red. It is a catalyst for photosynthesis - increasing the speed of the reaction by taking part in it but remaining unchanged at the end.

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Q. Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by

Q. Following diagram shows photosynthesis in green plants. Label the diagram with the words and sentences:

• Glucose made in the leaves transported to different plant parts
• Solar energy
• Carbon dioxide taken from atmosphere
• Chlorophyll
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Q. Question 9
The nitrogen molecules present in air can be converted into nitrates and nitrites by

(a) a biological process of nitrogen fixing bacteria present in soil
(b) a biological process of carbon fixing factor present in soil
(c) any of the industries manufacturing nitrogenous compounds
(d) the plants used as cereal crops in field

Q. Chlorophyll, the green colouring matter of plants contains

2.68 %

magnesium by weight. Calculate the number of magnesium atoms in

3.00 g

of chlorophyll. (atomic mass of

M g = 24

Q. Chlorophyll, the green colouring matter of plants contains

2.68 %

of magnesium by weight. Calculate the number of magnesium atoms in

2.00 g

of chlorophyll?

(Atomic mass of

M g = 24

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