Chemistry

Problem

Column-I Column-II

Column-I	Column-II
(A) Mond's process	(P) $\text{Cr}_2\text{O}_3 + 2\text{Al} \xrightarrow{\Delta} 2\text{Cr} + \text{Al}_2\text{O}_3$
(B) van Arkel process	(Q) $\text{TiCl}_4 + 2\text{Mg} \xrightarrow{\Delta} \text{Ti} + 2\text{MgCl}_2$
(C) Thermite process	(R) $\text{Ni}(\text{CO})_4 \xrightarrow{\Delta} \text{Ni} + 4\text{CO}$
(D) Kroll's process	(S) $\text{ZrI}_4 \xrightarrow{\Delta} \text{Zr} + 2\text{I}_2$