Identify $X$ and $Y$ in the reactions given below:

  • A
    $CrO_3$ $\quad$ $KMnO_4$ (alkaline),$\Delta$
  • B
    $CrO_2Cl_2$ $\quad$ $Cu, 573 \ K$
  • C
    $AlCl_3$ $\quad$ $CrO_3, H_2SO_4$,reflux
  • D
    $H_2O_2$ $\quad$ $KMnO_4$ (acidic),$\Delta$

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