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精英家教網 > 高中地理 > 題目詳情

【題目】Si、SiO2廣泛用于制造晶體管、光導纖維等。下列有關說法正確的是

A.附著油污的晶體管可用堿液浸泡

B.光導纖維遇堿會影響光信號傳輸

C.工業上用SiO2熱分解法冶煉硅

D.自然界中硅以游離態形式存在

【答案】B

【解析】硅和二氧化硅與堿液都反應,所以堿液浸泡除去油污的同時又腐蝕了晶體,A錯誤;二氧化硅能用于制光導纖維、二氧化硅能與氫氧化鈉溶液反應,生成硅酸鈉和水,所以形成光的斷路,所以光導纖維遇堿會影響光信號傳輸,B正確;工業上用SiO2熱還原法冶煉硅,而不是熱分解法冶煉硅,C錯誤;硅在自然界中以化合態形式存在,如二氧化硅、硅酸鹽等,不是以游離態形式存在,D錯誤;答案選B。

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