$ ( X ) + K_2CO_3 + Air \xrightarrow{heat} ( Y ) $
$ ( Y ) + Cl_2 \longrightarrow ( Z ) $ Pink
Which of the following is correct ?

  • A
    $X =$ black, $MnO_2$ , $Y =$ Blue, $K_2CrO_4$ , $Z = KMnO_4$
  • B
    $X =$ green, $Cr_2O_3$ , $Y =$ Yellow, $K_2CrO_4$ , $Z = K_2Cr_2O_7$
  • C
    $X =$ black, $MnO_2$ , $Y =$ green, $K_2MnO_4$ , $Z = KMnO_4$
  • D
    $X =$ black; $Bi_2O_3$ , $Y =$ colourless $KBiO_2$ , $Z = KBiO_3$

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