Which of the following mixtures is chromic acid?

  • A
    $K_2Cr_2O_7$ and $HCl$
  • B
    $K_2SO_4$ and conc. $H_2SO_4$
  • C
    $K_2Cr_2O_7$ and conc. $H_2SO_4$
  • D
    $H_2SO_4$ and $HCl$

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