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1. 銀灰色的鐵製品常常在使用一段時間之後變成黃褐色,過程中發生了什麼變化?原因為何? (A)銀灰色的是Fe,黃褐色的是FeO,前後發生化學變化 (B)因為顏色改變,故為物理變化 (C)反應前後遵守質
問題詳情
1. 銀灰色的鐵製品常常在使用一段時間之後變成黃褐色,過程中發生了什麼變化?原因為何?
(A)銀灰色的是Fe,黃褐色的是FeO,前後發生化學變化
(B)因為顏色改變,故為物理變化
(C)反應前後遵守質量守恆,且有新物質產生,故為化學變化
(D)以天平測量鐵製品,發現質量增加,表示體積變大,故為物理變化。
參考答案
答案:C
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