Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Peroxodiphosphoric acid has a P-O-O-P bridge, so D contains the requested identical-atom linkage. However thiosulfate has an S-S bond and tetrathionate has an S-S-S-S chain, so A and B also satisfy a literal X-X reading. D alone is an acid, but the stem includes sodium salts among its choices while calling them acids. Printed D is preserved with this wording defect, rather than claiming that the salts have no S-S bond.