【題目】鐵制品在通常情況下很易生銹，制造時(shí)往往在鐵制品表面電鍍一層銅起防銹作用，下列說(shuō)法正確的是（ ）

A.鍍銅鐵制品不可在酸性條件下使用

B.鍍銅鐵制品可以盛放硝酸銀溶液

C.鍍銅鐵制品不易生銹的原因之一是使鐵隔絕了空氣

D.鍍銅鐵制品是一種合金

【答案】C

【解析】

試題分析：銅在金屬活動(dòng)性順序表氫的后面，化學(xué)性質(zhì)穩(wěn)定，在其中不易銹蝕、與酸不發(fā)生反應(yīng)，但能與硝酸銀溶液發(fā)生置換反應(yīng)，因此，鍍銅鐵制品可以在酸性條件下使用，A錯(cuò)誤；銅能置換硝酸銀溶液中的銀，B錯(cuò)誤；銅在空氣中不易生銹，鐵制品鍍銅后，使鐵與空氣隔絕，防止了的鐵的銹蝕，C正確；合金是金屬或非金屬均勻地熔合在一起，鍍銅鐵制品銅和鐵不是均勻地熔合，不屬于合金，D錯(cuò)誤。故選C

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