Which of the following oxidation states are the most characteristics for lead and tin respectively?
(a) +4, +2 (b) +2, +4
(c) +4, +4 (d) +2, +2
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(b) The tendency to form +2 ionic state increase on moving down the group due to the inert pair effect. Most characteristic oxidation state for lead and tin are +2, +4 respectively.