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permanganic acid

n.
1.an unstable purple acid (HMnO4) known only in solution or of permanganate salts

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    Idiom of the Day

    at loggerheads (with someone)
    to be having a quarrel or disagreement with someone, to oppose someone
    We are at loggerheads with the company over their plans to build a new factory.



    1.
    They left (a) / their luggages (b) / at the railway station. (c) / No error (d)

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