Payal posted an Question
December 31, 2020 • 00:39 am 30 points
  • IIT JAM
  • Chemistry (CY)

A solution of [cro,l ion can be transformed to [cro, solution by adding (a) h,so (b) h,o, (c) naoh (d) nayso

A solution of [Cro,l ion can be transformed to [CrO, solution by adding (A) H,SO (B) H,O, (C) NaOH (D) NaySO

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    Dinesh khalmaniya 1 best-answer

    option C Explanation- The chromate ion (yellow colour) in acidic medium changes to dichromate ionCr2​O72−​ (orange - red colour). In alkaline medium, reverse happens. In solution,the dichromate ions convert to chromate ions by the action of a base. Thus chromate ion and dichromate ion exists in equilibrium.

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    got it Payal?

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    Priyanshu kumar Best Answer

    In alkaline medium, the dichromate ion is converted to the chromate ion. In acidic medium, the dichromate ion is converted to the chromate ion.

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    option C is correct

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