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0.5 gm of fuming H(2)SO(4) (Oleum) is di...

0.5 gm of fuming `H_(2)SO_(4)` (Oleum) is diluted with water. This solution is completely neutralised by 26.7 ml of 0.4 M `NaOH` solution. Calculate the percentage of free `SO_(3)` in the given sample. Give your answer excluding the decimal places.

A

`30.6%`

B

`40.6%`

C

`20.6%`

D

`50.6%`

Text Solution

Verified by Experts

The correct Answer is:
C
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