First slide
Oxoacids of Halogens
Question

Correct trends from ClO to ClO4are
    A) Oxidation ability decreases
    B) Number of delocalised electrons increases
    C) Number of lone electron pairs on chlorine decreases
    D) O – Cl bond length decreases

Moderate
Solution

 Order of bond length of Cl–O in oxyanions is, ClO4 < ClO3 < ClO2 < ClO–  So

   A) Oxidation ability decreases
    B) Number of delocalised electrons increases
    C) Number of lone electron pairs on chlorine decreases
    D) O – Cl bond length decreases

All are correct

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