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Keshav Rai

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  1. Asked: November 1, 2021In: Class 12 Biology

    Which one of the following is not a major characteristic feature of biodiversity hot spots?

    Keshav Rai
    Added an answer on November 1, 2021 at 11:17 am

    d. Destruction of habitat

    d. Destruction of habitat

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  2. Asked: November 1, 2021In: Class 12 Biology

    Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into:

    Keshav Rai
    Added an answer on November 1, 2021 at 11:17 am

    a. carbon dioxide and water

    a. carbon dioxide and water

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  3. Asked: November 1, 2021In: Class 12 Biology

    The loudness of a sound that a person can withstand without discomfort is about

    Keshav Rai
    Added an answer on November 1, 2021 at 11:16 am

    d. 80 dB.

    d. 80 dB.

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  4. Asked: November 1, 2021In: Class 12 Biology

    Among the following which one causes more indoor chemical pollution?

    Keshav Rai
    Added an answer on November 1, 2021 at 11:16 am

    c. burning mosquito coil

    c. burning mosquito coil

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  5. Asked: November 1, 2021In: Class 12 Biology

    Which of the following material takes the longest time for biodegradation?

    Keshav Rai
    Added an answer on November 1, 2021 at 11:16 am

    c. Bone

    c. Bone

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