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  4. The number of S=O bonds in pyrosulphuric acid is.

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Q. The number of $S=O$ bonds in pyrosulphuric acid is____.

The p-Block Elements - Part2

Solution:

The structure of pyrosulphuric acid $\left( H _{2} S _{2} O _{7}\right)$ is image
Hence, it contains $4 S = O$ bonds.