Part 1 of 2 in which of the following species does the...

Part 1 of 2 In which of the following species does the sulfur atom have the highest oxidation number? Select the single best answer. $H_2S$ $S_8$ $SO_3$ $HS^-$ Part 2 of 2 In which of the following species does the sulfur atom have the lowest oxidation number? Select the single best answer. $S^{2-}$ $SO_2$ $H_2SO_4$

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00:01 So hi everyone in this question in which species does sulfur have the highest the most positive less negative oxidation number so oxidation number is the charge assigned of an element according to some set of rule and that rule are known as the oxidation number rules so in hydrogen sulfide which is which is h2s the oxidation number of sulfur is minus 2 because hydrogen exist in plus 1 right and we can also calculate by assuming the sulfur oxidation number is x so the sum of oxidation number of all the element that is equal to 0.

00:32 So 2 into plus 1 plus x that is equal to 0.

00:35 So this x is the oxidation number of sulfur and plus 1 is the oxidation number of hydrogen.

00:40 So on solving we get the value of x that is minus 2.

00:43 In case of sulfur acid, the oxidation number of sulfur, if we solve, we get the value plus 4.

00:49 And oxygen is minus 2 and hydrogen is plus 1.

00:52 And if we assume the sulfur oxidation number, that is x, so 2 into plus 1 ,000, plus 1 ,000.

00:58 1 so 2 into plus 1 plus x plus x plus 3 into minus 2 that is equal to 0 sum of oxidation number of all the element that is equal to 0 so this plus 1 is the oxidation number of hydrogen and this minus 2 is the oxidation number of oxygen and x is the oxidation number of sulfur so again on solving we get the same value now in case of s 8 the oxidation number of sulfur is 0 because the oxidation number of the of the elements in the free form or elemental form that always is equal to 0 like ozone 0 .o3, 02, that is also 0 and 2 0.

01:38 So similarly as 8, that is equal to 0...

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