The number of $S = O$ bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are:

2, 3 and 4

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2, 4 and 3

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1, 4 and 4

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1, 4 and 3

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Solution

The correct option is C $1, 4 and 4$
Sulphurous acid $(H_{2} S O_{3})$
Peroxodisulphuric acid $(H_{2} S_{2} O_{8})$
Pyrosulphuric acid $(H_{2} S_{2} O_{7})$

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S = O

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(H_{2} S O_{5})

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The number of S-S bond in pyrosulphuric acid (oleum) is:

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