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.

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

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Answers are 1,2,4 its correct on edgenuity.