【導讀】2021年廣州市普通高中畢業(yè)班綜合測試（二）。7．下列說法正確的是。A．青銅、碳素鋼和石英都是合金。B．陶瓷、玻璃和水泥都是無機非金屬材料。C．乙醇與乙醛互為同分異構體，都能發(fā)生銀鏡反應。D．油脂皂化和蛋白質水解都是由高分子生成小分子的過程。8．合成二甲醚的三步反應如下：。A．ΔH＝2ΔH1+ΔH2+ΔH3B．ΔH＝。9．下列敘述Ⅰ和Ⅱ均正確并且有因果關系的是。AFe3+有氧化性Fe23可作凈水劑。常溫下濃硫酸不能用鐵罐。Cl2能使?jié)駶櫟挠猩紬l褪。電解熔融狀態(tài)的Al2O3制備。10．常溫下，濃度均為mol·L-1的下列溶液中，粒子的物。質的量濃度關系正確的是。11．設nA為阿伏加德羅常數的數值，下列說法正確的是。B．1molNa與足量水反應，轉移2nA個電子。12．某小組為研究原電池原理，設計如圖裝置，下列敘述正。D．若X為Cu，Y為Zn，鋅片發(fā)生還原反應。22．下列實驗操作、現象和結論均正確的是。將新制氯水和NaBr溶。D．X和Y兩者最高價氧化物對應的水化物能相互反應。和2SO4兩種產品．相關反應的化學方程式為

　　

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