Consider the following statements ,
`(I)` Amongst `HCl,HBr,HI` and `HOCl,HCl` is most stable to heat.
`(II)` Chlorine gas if evolved when potassium chloride reacts with iodine.
`(III)` The basicity of `F^(-),Cl^(-),Br^(-)` , and `I^(-)` follows the order `F^(-)gt Cl^(-) gtBr^(-) gtI^(-)`
`(IV)` Sodium hypochlorite is used as bleaching and sterilising agent of these,

Options

A. `(I),(II),` and `(III)` are correct
B. `(I),(II)`, and `(IV)` are correct
C. `(I),(III)`, and `(IV)` are correct
D. All of these

Answer

3

Explanation

`(I)HCl` because of high bond enthalpy of it.
`(II)2KCIO_(3)+I_(2)rarr 2KIO_(3)+Cl_(2)`
`(III)` Correct order , `F^(-)` because of high electron density on account of small size easily donate the electron pair, is strongest base.
`(IV)` It is used as bleaching as well sterilising agent ( as it acts strong oxidising agent ).