Multiple choice The oxidation state of sulphur in the cyclic trimer of sulphur trioxide is +1 +3 +2 +6 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Cyclic trimer of sulphur trioxide is (SO3)3 , the oxidation of sulphur in it can be calculated as follows: Let the oxidation state of sulphur be x,hence 3x + 18 = 0, so x = 18/3 = +6