Which of the following statements is true?

  • A
    $I_4O_9$ exists as $I^{3+}(IO_3^-)_3$.
  • B
    $I_4O_9$ is a mixed oxide of $I(III)$ and $I(V)$.
  • C
    Upon decomposition,$I_4O_9$ gives $I_2O_5$.
  • D
    All of these statements are true.

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Which of the following can not undergo hydrolysis?

$Cl_{2(g)} + Ba(OH)_2 \to X (aq.) + BaCl_2 + H_2O$
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$Y \xrightarrow[\Delta > 365 \ K]{\Delta } Z + H_2O + O_2$
$Y$ and $Z$ are respectively

Explain why the stability of oxoacids of chlorine increases in the order given below:
$HClO < HClO_2 < HClO_3 < HClO_4$

Match the following molecules with their respective colours:
$A$. $F_2$$I$. Red
$B$. $Cl_2$$II$. Violet
$C$. $Br_2$$III$. Yellow
$D$. $I_2$$IV$. Greenish yellow

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