question_answer

Match the following:  

I		II
[A]	Calcination	(1)	\[2C{{u}_{2}}S\,+\,3{{O}_{2}}\,\,\to \]\[\,\,2C{{u}_{2}}O\,+\,2S{{O}_{2}}\]
[B]	Roasting	(2)	\[F{{e}_{2}}{{O}_{3}}.n{{H}_{2}}O\,\,\to \] \[F{{e}_{2}}{{O}_{3}}+n{{H}_{2}}O\,\,\]
[C]	Flux	(3)	\[C{{r}_{2}}{{O}_{3}}+2Al\,\,\to \,\,\]\[A{{l}_{2}}{{O}_{3}}+2Cr\]
[D]	Thermite	(4)	\[Si{{O}_{2}}+\,FeO\,\to \,FeSi{{O}_{3}}\]

A) A - 1     B - 2     C - 3     D - 4

B)                    A - 2     B - 1     C - 4     D - 3

C)                    A - 4     B - 1     C - 2     D - 3

D)                    A - 3     B - 1     C - 2     D - 4