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

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:銅在金屬活動性順序表氫的后面,化學性質穩定,在其中不易銹蝕、與酸不發生反應,但能與硝酸銀溶液發生置換反應,因此,鍍銅鐵制品可以在酸性條件下使用,A錯誤;銅能置換硝酸銀溶液中的銀,B錯誤;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錯誤。故選C

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