20% oleum means that in 100 kg oleum, there are 20 kg of

1.	20% oleum means that in 100 kg oleum, there are 20 kg of
A.	SO3 and 80kg of H2SO4.
B.	H2SO4 and 80kg of SO3.
C.	SO3 for each 100 kg of H2SO4.
D.	none of these.
Answer» B. H2SO4 and 80kg of SO3.

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