Which of the following compounds is formed when Is it boiled with sulphur?

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answer is D.

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Detailed Solution

Concept- An inorganic substance is sodium thiosulphate. Usually, it comes in the form of colourless or white pentahydrate. The solid is a well-dissolving efflorescent crystalline material.
Since it is a reducing agent, it is frequently employed to regulate the reductive-oxidative characteristics of the surface of sulphide minerals while they are floating.
Prior to iodine complexing with the starch to produce the distinctive blue-black hue, it is used to decrease iodine back to iodide. Iodine serves as an intermediary in an indirect approach to evaluate the various oxidising agents, which use the moderately potent reducing agent thiosulphate ion.
When

is boiled with S then the following reaction will take place:

The product formed is

.
Hence, the correct answer is option 4.

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