Which of the following is incorrect ?

Options

A. The `O-O` bond length in `H_(2)O_(2)` is larger than that is `O_(2)F_(2)`
B. The `O-O` bond length in `H_(2)O_(2)` is very slightly smaller than in `O_(2)^(2-)` ion.
C. `O_(2)^(-)` and `O_(2)^(+)` species are paramagnetic and have same number of unpaired electrons.
D. None.

Answer

4

Explanation

`(1) H_(2)O_(2)=1.48Å` due to repulsions between non`-` bonded pairs of electron on `O-` atoms and `O_(2)F_(2)=1.217Å`.
`(2) ` In `O_(2)^(2-)` very slightly increases due to charge `(-ve)` on two O atoms.
`{:(ulbar(" ""Bond order"" ""internuclear Distance (p m)"" ""Number of unpaired(s) Electrons")),(O_(2)^(+)" (dioxygenyl)"" "2.5" "112.3" "1),(O_(2)" (dioxygen)"" "2.0" "120.07" "2),(O_(2)^(-)" (superoxide)"" "1.5" "128" "1),(O_(2)^(2-)" (peroxide)"" "1.0" "149" "0):}`