In photosynthesis,what is reduced and what is oxidised?

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Solution

Photosynthesis is the process by which green plants make their own food using carbon-dioxide, water and chlorophyll in presence of sunlight.
Reduction means addition of hydrogen or electrons while the oxidation means loss of hydrogen or electrons.
In photosynthesis carbon-dioxide is reduced to carbohydrates and water is oxidised to oxygen.
The reduction of carbon-dioxide occurs in the following way-
CO₂+ 24H⁺+ 24e^- → C₆H₁₂O₆+ 6H₂O
The oxidation of water occurs in the following ways-
12H₂O → 6O₂+ 24H⁺+ 24e^-

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Similar questions

Which one chemical reaction occurs during photosynthesis ?

(a) Carbon dioxide is reduced and water is oxidised.

(b) Water is reduced and carbon dioxide is oxidised.

(d) Both carbon dioxide and water are reduced.

Which one chemical reaction occurs during photosynthesis ?

1)CO2 is reduced and H2O is oxidized

2) CO2 is oxidised and H2O is reduced

3)both are oxidized

4) both are reduced

Please include the reason also

Z n O + C \to Z n + C O

What is an oxidation reaction ? Identify in the following reaction (i) the substance oxidised, and (ii) the substance reduced :

$Z n O + C ⟶ Z n + C O$

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