Here, each question contains statements given in two columns which have to be matched.
Statements in column I are labelled as A,B, C, and D whereas in column II are labelled as p,q,r and s.
The answers to these questions are to be appropriately bubbled as illustrated in the following example.
If the correct matches are A-p, A-s, B-q, B-r, C-p, C-q and D-p, then correctly labelled `4 xx 4` matrix looks like

`{:(,"Column-I",,"Column-II"),("A.",CuSO_(4)+ZnrarrCu+ZnSO_(4),p.,"Non-metal displacement reaction"),("B.",2KClO_(3)rarrKCl+3O_(2),q.,"Disproportionation reaction"),("C.",3Cl_(2)+6KOHrarr5Cl^(-)+ClO_(3)^(-)+3H_(2)O,r.,"Decomposition reaction"),("D.",Cl_(2)+2KClrarr2KCl+I_(2),s.,"Redox reaction"):}`

Answer

`(##DIN_OBJ_CHM_V01_C4_1_E01_174_A01##)`