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The total number of most common oxidation states which are possible for chlorine, among the following mentioned oxidation states is:

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Important Questions on The p-Block Elements
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-atom is more electronegative than -atom, yet has lower acid strength than . Why?

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exists but does not exist. Why?

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Statement I: Acid strength increases in the order given as
Statement II:
As the size of the elements increases down the group, the bond strength of 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.

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