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A certain compound (X) when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white.The compound is
  • a)
    K2CO3
  • b)
    KI [1994]
  • c)
    KBr
  • d)
    K3PO4
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A certain compound (X) when treated with copper sulphate solution yiel...
KI reacts with CuSO4 solution to produce cuprous iodide (white precipitate) and I2 (which gives brown colour) Iodine reacts with hypo (Na2S2O35H2O) solution.
Decolourisaiton of solution shows the appearance of white precipitate.
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