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Câu 7. Cho các oxit sau CaO, MgO, SO2, H2O, CO số cặp oxit tác dụng được với nhau là A. 4 B. 3 C. 5 D. 2 Câu 8. Cho các oxit sau: SO3, Na2O, P2O5, SiO2, Al2O3, Fe2O3 5.1 Số oxit tác dụng được với nước là A. 3 B. 4 C. 5 D. 6 5.2 Sô oxit tác dụng được với dd NaOH là A. 3 B. 4 C. 5 D. 6 5.3 Số oxit tác dụng được với dd H2SO4 là A. 3 B. 4 C. 5 D. 6 Câu 11. Phương pháp nào sau đây dùng điều chế khí SO2 trong công nghiệp? A. Cho muối sunfit (=SO3) hoặc hidro sunfit ( - HSO3) tác dụng với các axit như HCl, H2SO4 B. Đốt S trong không khí hoặc đốt quặng pirit sắt (FeS2) C. Cho kim loại Cu tác dụng với axit H2SO4 đặc nóng D. Cho muối sunfua (=S) tác dụng với các axit như HCl, H2SO4
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