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4. 在下列化學反應中,哪一個化合物是氧化劑?6KNO3 + 5S + 2CaCO3 →3K2SO4 + 2CaSO4 + 2CO2 + 3N2(A) KNO3 (B) S (C) CaCO3 (D)
問題詳情
4. 在下列化學反應中,哪一個化合物是氧化劑?6KNO3 + 5S + 2CaCO3 →3K2SO4 + 2CaSO4 + 2CO2 + 3N2
(A) KNO3
(B) S
(C) CaCO3
(D) CaSO4
(E) N2
參考答案
答案:A
難度:適中0.678571
統計:A(19),B(1),C(3),D(0),E(4)
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小林
】評論
氧化劑:本身氧化數減少KNO3 之N為+5 ,變成N2 之N為0,氧化數減少,所以KNO3為氧化劑
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