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Standard VIII

Chemistry

Air Pollution

Plants utilis...

Question

Plants utilise $C O_{2}$ from the atmosphere for photosynthesis thereby:

decreasing the amount of

C O_{2}

in the air

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increase in the amount of

C O_{2}

in air

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Both A and B

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None of these

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Solution

The correct option is A decreasing the amount of $C O_{2}$ in the air
Plants utilise $C O_{2}$ from the atmosphere for photosynthesis, thereby decreasing the amount of $C O_{2}$ in the air.

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Similar questions

Q. Which of the following are true regarding

{CO}_{2}

?

a. Excess of

{CO}_{2}

acts as a pollutant
b. Plants take in

{CO}_{2}

for photosynthesis
c. Deforestation leads to decrease in the amount of

{CO}_{2}

in air
d. Less quantity of

{CO}_{2}

causes rise in temperature

Q. Assertion :The atmospheric concentration of

C O_{2}

at which photosynthesis just compensates for respiration is referred to as

C O_{2}

compensation point. Reason: The

C O_{2}

compensation point is reached when the amount of

C O_{2}

uptake is less than that generated through respiration, because the level of

C O_{2}

in the atmosphere is more than that required for achieving

C O_{2}

compensation point.

Q. It is given that in photosynthesis

C O_{2} + H_{2} O

forms

C_{6} H_{12} O_{6}

but respiration involves oxidation of

C_{6} H_{12} O_{6}

C O_{2}

and

H_{2} O

for producing energy so can't plants directly use

C O_{2}

and

H_{2} O

to synthesize energy (in form of ATP) that they had obtained from atmosphere and water. If so then what's the use of photosynthesis for plants.

Q. When the level of

C O_{2}

used in photosynthesis is equal to the amount of

C O_{2}

released by respiration and photorespiration it is called ___________.

Q. Photosynthesis in C4-plants is relatively less limited by atmospheric CO₂ levels because

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Plants utilise CO2 from the atmosphere for photosynthesis thereby:

The correct option is A decreasing the amount of CO2 in the airPlants utilise CO2 from the atmosphere for photosynthesis, thereby decreasing the amount of CO2 in the air.

Plants utilise $C O_{2}$ from the atmosphere for photosynthesis thereby:

The correct option is A decreasing the amount of $C O_{2}$ in the air
Plants utilise $C O_{2}$ from the atmosphere for photosynthesis, thereby decreasing the amount of $C O_{2}$ in the air.