Correct statement regarding halogen is/are

MCQ

A
Normally interhalogen compounds are more reactive than fluorine
✓
Oxidising power order $HClO_4 > HClO_3 > HClO_2 > HClO$
C
Chlorine shows bleaching action by reducing coloured substance
D
Stability order of oxides $I > Cl > Br$

✓

Answer

Correct option: B.

Oxidising power order $HClO_4 > HClO_3 > HClO_2 > HClO$

b
Both Assertion and Reason are true but reason is not the correct explanation of assertion. Greater the number of negative atoms present in the oxy-acid make the acid stronger. In general, the strengths of acids that have general formula $(HO)_m$ $ZO_n$ can be related to the value of $n$. As the value of $n$ increases, acidic character also increases. The negative atoms draw electrons away from the $Z-$ atom and make it more positive. The $Z-$ atom, therefore, becomes more effective in withdrawing electron density away from the oxygen atom that bonded to hydrogen. In turn, the electrons of $H -O$ bond are drawn more strongly away from the $H-$ atom. The net effect makes it easier from the proton release and increases the acid a strength