Q.

Conjugate base for Bronsted acids H2O and HF are                   [2019]

1 H3O+ and H2F+, respectively  
2 OH- and H2F+, respectively  
3 H3O+ and F-, respectively  
4 OH- and F-, respectively   

Ans.

(4)

 Bronsted acid Conjugate baseH2OOH-HFF-