In the case of auto catalysis:

$A$ catalyst increases the rate of reaction by...........

Which of the following is used as a catalyst in the Fischer-Tropsch process for the synthesis of gasoline?

Match the following:

$List-I$ (Process)	$List-II$ (Catalyst)
$(A)$ Ostwald's process	$(I)$ $NO$
$(B)$ Lead Chamber process	$(II)$ $Fe$
$(C)$ Deacon's process	$(III)$ $Pt/Rh$
$(D)$ Haber's process	$(IV)$ $CuCl_2$

The correct answer is:

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 .......

$A$ metal catalyst $(X)$ is used in the catalytic converter of automobiles. This prevents the release of gas $(Y)$ into the atmosphere. What are $(X)$ and $(Y)$ respectively?