Which catalyst is used to increase the rate of the vulcanization process of rubber?

  • A
    $FeO$
  • B
    $ZnO$
  • C
    $NiO$
  • D
    $Mn_{2}O_{3}$

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Name the functional group of the following compounds:
$(i) \ R-COOH$
$(ii) \ R-COOR'$
$(iii) \ R-OH$
$(iv) \ R-X$

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What are biochemical catalysts called?

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