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Q.

Which of the following represents a balanced chemical equation for photosynthesis?


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a

  <math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><msub><mi>CO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi><mo>&#xA0;</mo><mover><mo>&#x2192;</mo><mo>&#x25B3;</mo></mover><mo>&#xA0;</mo><msub><mi mathvariant="normal">C</mi><mn>6</mn></msub><msub><mi mathvariant="normal">H</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>6</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></math>

b

<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><msub><mi>CO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><mi mathvariant="normal">H</mi><mo>&#xA0;</mo><mover><mo>&#x2192;</mo><mo>&#x25B3;</mo></mover><mo>&#xA0;</mo><msub><mi mathvariant="normal">C</mi><mn>6</mn></msub><msub><mi mathvariant="normal">H</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>6</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>3</mn><mi mathvariant="normal">O</mi></math>

c

<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><mi>CO</mi><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mo>&#xA0;</mo><mi mathvariant="normal">O</mi><mover><mo>&#x2192;</mo><mo>&#x25B3;</mo></mover><mo>&#xA0;</mo><msub><mi mathvariant="normal">C</mi><mn>6</mn></msub><msub><mi mathvariant="normal">H</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>6</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>3</mn><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></math>

d

<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><msub><mi>CO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mo>&#xA0;</mo><mover><mo>&#x2192;</mo><mo>&#x25B3;</mo></mover><mo>&#xA0;</mo><msub><mi mathvariant="normal">C</mi><mn>6</mn></msub><msub><mi mathvariant="normal">H</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>6</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>3</mn><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></math> 

answer is A.

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Detailed Solution

Concept- The process of photosynthesis provides plants with the energy they need to grow.
In the presence of sunlight and chlorophyll, plants use water from the soil and carbon dioxide from the air to create glucose, which serves as a kind of stored energy.
As we know from the molecular structure of glucose, oxygen is produced as a byproduct when glucose is made by photosynthesis.
<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><msub><mi>CO</mi><mn>2</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi><mo>&#xA0;</mo><mover><mo>&#x2192;</mo><mo>&#x25B3;</mo></mover><mo>&#xA0;</mo><msub><mi mathvariant="normal">C</mi><mn>6</mn></msub><msub><mi mathvariant="normal">H</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>6</mn></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><mn>6</mn><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></math>Photosynthesis is a process which takes place in the presence of light where carbon dioxide and water convert into glucose or sugar and there is the evolution of oxygen gas. It is an endothermic process and we must know that during photosynthesis carbon dioxide is reduced and water is oxidised.
Hence, the correct answer is option 1.
 
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