Blast furnace s l a g may contain impurities of Group IV and V oxides. These impurities cause the s l a g to be less effective at neutralising acidity. Explain why Group IV and V oxides are less effective at neutralising acidity.

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The correct answer would be b) volume versus temperature, because they are also directly proportional.

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.