7th Class Science Physical and Chemical Changes

  • question_answer 3)
    What is photosynthesis? Is it a chemical reaction?

    Answer:

    The process by which plants make their own food using carbon dioxide and water in the presence of chlorophyll and sunlight, is known as photosynthesis. Chlorophyll is a green pigment present in the leaves of plants. The pigment capture the sun's energy which is used to prepare food from' carbon dioxide and water. \[6C{{O}_{2}}+6{{H}_{2}}O\xrightarrow[\text{Sunlight}]{\text{Chlorophyll}}\underset{\text{Glucose}}{\mathop{{{C}_{6}}{{H}_{12}}{{O}_{6}}}}\,+6{{O}_{2}}\] It is a chemical process.  


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