SSC General Science & Technology Sample Paper NCERT Sample Paper-7

  • question_answer
    The rotenone is

    A)  abioherbicide

    B)         a natural herbicide

    C)  An insect hormone

    D)  a natural insecticide

    Correct Answer: D

    Solution :

    [d] Rotenone is a colourless, crystalline ketonic compound which is soluble in organic solvent such alcohol, ether but insoluble in 'water, weak acid and weak base. It is a valuable natural insecticide. It was first isolated from Derris in 1902, by Kazuo Nagai.

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