The correct order of decreasing `C-O` bond length of (1) `CO,(II)CO_(3)^(2-) (III)CO_(2)` is .

Options

A. `CO_(3)^(2-) lt CO_(2) lt CO`
B. `CO_(2) lt CO_(3)^(2-) lt CO`
C. `CO lt CO_(3)^(2-) lt CO_(2) `
D. ` CO lt CO_(2) lt CO_(3)^(2-)`

Answer

d

Explanation

B O in CO i.e. `overset(-)(C) = overset(+)(O)`: is 3, that of `C = C = O` is 2 while that of `CO_(3)^(2-)` ion is 1.33. since the bond length increases as the bond order decrease, i.e. `CO lt CO_(2) lt CO_(3)^(2-)`. Thus option (d) is correct.