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    Chemistry A-Level

    Distinguishing alkenes from alkanes

    What Distinguishing alkenes from alkanes means in Chemistry A-Level, as defined for OCR.

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    Reference: OCR

    An alkane leaves the bromine water colour unchanged, whereas decolourisation indicates unsaturation.
    OCR · Alkenes
    An alkane gives no rapid decolourisation in the dark, unlike an alkene.
    OCR · Chromatography and qualitative analysis

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