Which of the following combination of species can evolve `O_(2)`?

Options

A. `PbO_(2)+`warm conc. `H_(2)SO_(4)`
B. `NaOH+F_(2)`
C. `PbO_(2)+`conc. `HNO_(3)`
D. `XeF_(2)+H_(2)O`

Answer

A, B, C, D

Explanation

(a). `PbO_(2)+"warm conc. "H_(2)SO_(4) to PbSO_(4)darr+O_(2)uarr`
(b) `2NaOH+F_(2) to 2NaF+(1)/(2)O_(2)+H_(2)O`
(c) `2PbO_(2)+"conc. "2HNO_(3) to 2PbNO_(3)+(5)/(2)O_(2)+H_(2)O`
(d) `XeF_(2)+H_(2)O to Xe+(1)/(2)O_(2)+2HF`.