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In coal, pyrites (FeS(2)) is present as ...

In coal, pyrites `(FeS_(2))` is present as a pollution-causing impurity, which is removed by combustion.
`2FeS_(2) + 5O_(2) rarr 4SO_(2) + 2FeO`.
What volume of `3.0 M KOH` would be required to react with the `SO_(2)` produced in

A

`2.77 L`

B

`5.54 L`

C

`1.38 L`

D

`8.31 L`

Text Solution

Verified by Experts

The correct Answer is:
B
`2KOH + SO_(2) rarr K_(2) SO_(3) + H_(2) O`
Moles of `KOH = 2 xx` moles of `SO_(2) = 2 xx 8.32`
`M xx V_(L) =` Moles of `SO_(2)`
`3 xx V_(L) = 2 xx 8.32`
`V_(L) = 5.54 L`
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