Mechanical pulp bleached with dithionite no more than a few months old is calculated by detecting traces of __________ as H2S liberated by stannous chloride.

Mechanical pulp bleached with dithionite no more than a few months ol

1.	Mechanical pulp bleached with dithionite no more than a few months old is calculated by detecting traces of __________ as H2S liberated by stannous chloride.
A.	SO2
B.	MnO4
C.	Cl2
D.	H2
Answer» B. MnO4

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Mechanical pulp bleached with dithionite no more than a few months old is calculated by detecting traces of __________ as H2S liberated by stannous chloride.

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