Match the underlined atoms in Column I and oxidation number in Column…

The correct answer is option 4. (a)-(r), (b)-(s), (c)-(q), (d)-(p)

Column I	Column II
(a) MnO4-	(r) 7
(b) CrO42-	(s) 6
(c) ZnO22-	(q) 2
(d) [Ag(CN)2]-	(p) 1

MnO₄^- 

x + 4(-2) = -1

x - 8 = -1

x = -1 + 8 = 7

CrO₄^2- 

x + 4(-2) = -2

x - 8 = -2

x = -2 = 8 = +6

ZnO₂^2- 

x + 2(-2) = -2

x - 4 = -2

x = -2 + 4 = +2

[Ag(CN)₂]^- 

x + 2(-1) = -1

x - 2 = -1

x = -1 + 2 = 1