Consider the statements about oxyacids of sulphur: I. H2S2O8 contains one O-O linkage. II. H2S2O7 contains an S-O-S linkage. III. H2S2O6 contains an S-S bond. IV. In H2S2O3 both sulphur atoms have the same oxidation state. V. H2SO5 contains an O-O linkage. The number of correct statements is

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JEE Advanced levelSingle correct optionDifficulty 3 of 3pn160

Consider the statements about oxyacids of sulphur: I. $H X_{2} S X_{2} O X_{8}$ contains one O-O linkage. II. $H X_{2} S X_{2} O X_{7}$ contains an S-O-S linkage. III. $H X_{2} S X_{2} O X_{6}$ contains an S-S bond. IV. In $H X_{2} S X_{2} O X_{3}$ both sulphur atoms have the same oxidation state. V. $H X_{2} SO X_{5}$ contains an O-O linkage. The number of correct statements is

AThree
BTwo
CFive
DFour

Answer: D

H2S2O8 is

(HO) O X_{2} S - O - O - SO X_{2} (OH)

(I true). H2S2O7 has an S-O-S bridge (II true). H2S2O6 has an S-S bond (III true). In H2S2O3 the central S is +6 and the thio S is -2 (IV false). H2SO5 has a peroxo group (V true). So four are correct.

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Answer: D

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