Iodine is formed when $KI$ reacts with a solution of

  • A
    $CuSO_4$
  • B
    $(NH_4)_2SO_4$
  • C
    $ZnSO_4$
  • D
    $FeSO_4$

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When $Cu^{2+}$ ion is treated with $KI$,a white precipitate is formed. Explain the reaction with the help of a chemical equation.

Which one of the following oxides is ionic?

Correct order of oxidising nature is

$Cu^{2+}(aq.) + X^{-}(aq.) \xrightarrow{R.T.} CuX \downarrow + X_2$
$X$ cannot be

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