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प्रश्न
Consider the reaction:
\[\ce{6 CO2(g) + 6H2O(l) → C6 H12O6(aq) + 6O2(g)}\]
Why it is more appropriate to write these reaction as:
\[\ce{6CO2(g) + 12H2O(l) → C6 H12O6(aq) + 6H2O(l) + 6O2(g)}\]
Also, suggest a technique to investigate the path of the redox reactions.
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उत्तर
The process of photosynthesis involves two steps.
Step 1:
H2O decomposes to give H2 and O2.
Step 2:
The H2 produced in step 1 reduces CO2, thereby producing glucose (C6H12O6) and H2O.
\[\ce{6CO_{2(g)} + 12H_{2(g)} -> C_6H_12O_{6(s)} + 6H_2O_{(l)}}\]
Now, the net reaction of the process is given as:
| \[\ce{2H_2O_{(l)} -> 2H_{2(g)} + O_{2(g)} ] × 6}\] |
| \[\ce{6CO_{2(g)} + 12H_{2(g)} -> C_6H_12O_{6(g)} + 6H_2O_{(l)}}\] |
|
\[\ce{6CO_{2(g)} + 12H_2O_{(l)} -> C_6H_12O_{6(g)} + 6H_2O_{(l)} + 6O_{2(g)}}\] |
It is more appropriate to write the reaction as given above because water molecules are also produced in the process of photosynthesis.
The path of this reaction can be investigated by using radioactive H2O18 in place of H2O.
संबंधित प्रश्न
Whenever a reaction between an oxidising agent and a reducing agent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. Justify this statement giving three illustrations.
How do you count for the following observations?
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In Ostwald’s process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. of ammonia and 20.00 g of oxygen?
Balance the following reaction by oxidation number method.
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Which of the following is a redox reaction?
What is the change in oxidation number of Sulphur in following reaction?
\[\ce{MnO^-_{4(aq)} + SO^{2-}_{3(aq)} -> MnO^{2-}_{4(aq)} + SO^{2-}_{4(aq)}}\]
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\[\ce{CH4_{(g)} + 2O2_{(g)} -> CO2_{(g)} + 2H2O_{(l)}}\]
Write balanced chemical equation for the following reactions:
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Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.
\[\ce{HgCl2 (aq) + 2KI (aq) -> HgI2 (s) + 2KCl (aq)}\]
Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.
\[\ce{4NH3 (g) + 3O2 (g) -> 2N2 (g) + 6H2O (g)}\]
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This equation represents which of the following behaviour of H2O2?
