The carbonates of alkaline earth metals decompose on heating to give:
$I$. $CO_2$
$II$. Metal oxide
$III$. $H_2 O$
$IV$. $CO$

  • A
    $I$, $III$ and $IV$
  • B
    $I$ and $II$
  • C
    $I$, $II$ and $III$
  • D
    $II$ and $III$

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