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NEET levelSingle correct optionDifficulty 1 of 3rx008

The average oxidation number of sulfur in sodium thiosulfate, $Na X_{2} S X_{2} O X_{3}$ , is

A $+ 2$
B $+ 4$
C $+ 6$
D $- 2$

Answer: A

2 (+ 1) + 2 x + 3 (- 2) = 0

gives

2 x = 4

, so

x = + 2

on average. The two S atoms actually differ, but the average is

+ 2

.

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