Q.

Identify the correct formula of ‘oleum’ from the following.

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a

H2S2O8

b

H2S2O7

c

H2SO3

d

H2SO4

answer is B.

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Detailed Solution

Oleum is  ′H2S2O7′H2SO4+SO3.It is Fuming sulphuric acid.
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Identify the correct formula of ‘oleum’ from the following.