How is Raney nickel,which is used as a catalyst,prepared?

Fill in the blanks:
$1.$ $TiCl_4$ with $Al(CH_3)_3$ is called ............ catalyst.
$2.$ In the Haber process,ammonia is produced from a mixture of ............ .

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

In the oxidation of oxalic acid by $KMnO_4$,the color of $KMnO_4$ disappears slowly at the start of the reaction but disappears very fast afterwards. This is an example of:

Reactions in $Zeolite$ catalysts depend on,

Iron $(III)$ catalyses the reaction between iodide and persulphate ions,in which
$A$. $Fe^{3+}$ oxidises the iodide ion
$B$. $Fe^{3+}$ oxidises the persulphate ion
$C$. $Fe^{2+}$ reduces the iodide ion
$D$. $Fe^{2+}$ reduces the persulphate ion
Choose the most appropriate answer from the options given below: