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    The concentration of formaldehyde in formalin solution is
    Question

    The concentration of formaldehyde in formalin solution is

    A.

    10% vol/vol

    B.

    50% vol/vol

    C.

    30% vol/vol

    D.

    40% vol/vol

    Correct option is D


    Formalin is an aqueous solution of formaldehyde, typically containing 40% formaldehyde by volume, used as a disinfectant or preservative.

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