Statement-1: The acidic strength order of hydra acids is `HF lt HCI lt HBr lt HI`
Statement-2: The E.N. of halogens are `F gt CI gt Br gt I`.

Strength of halogen acids, HF, HCl, HBr and HI varies as :

Statement 1: Acid strength increases in the order given as HFltltHClltltHBrltltHI . Statement 2: As the size of the elements F,Cl,Br,I increases down the group, the bond strength of HF,HCl,HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below:

Statement-1 : Rate of electrophilic addition on alkene Higt HBr gt HCI gt HF. Statement-2 : Order of nucleophilicity I^(-) gt Br^(-) gt Cl^(-) gt F^(-).

Why the acid strengths of acids increase in the order : HClO lt HClO_2 lt HClO_3 lt HClO_4 ?

The order of reacivity of grou-1 elements is Li lt Na lt K lt Rb lt Cs whereas that of group-17 elements is F gt Cl gt Br gt I . Explain.