In the case of auto catalysis:

Which of the following reactions requires a catalyst?

In the oxidation of oxalic acid by $KMnO_4$,the color of $KMnO_4$ disappears slowly at the beginning of the reaction,but then it disappears very rapidly. This is an example of .......

Reactions in $Zeolite$ catalysts depend on,

Which of the following statements regarding adsorption theory of heterogeneous catalysis is not correct?

In the reaction $KMnO_4 + H_2SO_4 + H_2C_2O_4$,the $Mn^{2+}$ ions act as: