76,77,&78

76,77,&78 The oxidation number of sulphur in Sr S and H2S are 2) +2, +1 and -2 l) 0, + land-2 4) -2, + land-2 and +2 The oxidation number of nitrogen in NCI 3) zæro 4) —1/3 What are the oxidation numbers of 'N- NH.NO,? Chl«rine has two different oxidation states which of the following cornrx»und c oxidation of phosphoru

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76) Oxidation number of S in S_{8} is 0 . In S_{2} F_{2} it is + 1 and, in H_{2} S it is - 2 . Hence, correct answer is (1) 77) In {NCl}_{3}, oxidation number of N can be calculated as x + 3 (- 1) = 0 or, x = + 3 So, correct answer is (1) 78) In {NH}_{4} {NO}_{3} it exists as {NH}_{4}^{+} {NO}_{3}^{-} So, N in {NH}_{4}^{+} has - 3 oxidation state x + 4 (+ 1) = 1 or, x = 1 - 4 = - 3 N in {NO}_{3}^{-} has + 5 oxidation state x + 3 (- 2) = - 1 or, x = - 1 + 6 = + 5 Hence, correct answer is (2)