Oxidising Nature

Assertion : London smog is oxidising in nature . Reason : London somg contains O_(3), NO_(2) and Hydrocabons .

Which of the following is true for the species having 3d^(4) configuration? (A) Cr^(2+) is reducing in nature. (B) Mn^(3+) is oxidising in nature. (C) Both (A) and (B) (D) None of these

How would you account for the following : (i) Cr^(2+) is reducing in nature while with the same d-orbital configuration (d^(4)),Mn^(2+) is oxidising in nature. (ii) In the transition series of metals, the metal which exhibits the greatest number of oxidation states occurs in the middle of the series.

Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. Reason: Oxidising agent oxidises I_(2) into HI.

Correct order of oxidising strength is