Explain in detail about Bio- pets repell...

Explain in detail about Bio- pets repellent and steps involved in preparation/
Explain the preparation of a organic pesticide.

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NCERT TAMIL- GROUP 1 s - BLOCK ELEMENTS -QUESTIONS ( D. EXPLAIN BRIEFLY ON THE FOLLOWING)

Explain the exchange reactions of deuterium
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Write short notes on Ortho and Para hydrogen.
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Difference between ortho and para hydrogen.
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Explain in detail about Bio- pets repellent and steps involved in prep...
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Distinguish between hard water and soft water
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Explain the oxidizing property of hydrogen peroxide.
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Explain how liquid hydrogen can be used as a fuel
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How does magnesium occur in nature? How is the metal extracted from it...
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