
自然八下ch.2習作(翰林)
Quiz
•
Chemistry
•
8th Grade
•
Hard
霍 建豪
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
右圖為許多食品或藥品包裝內常見的脫氧劑,主要成分為鐵粉,可以延長食品或藥品的保存期限。關於脫氧劑的敘述,下列何者錯誤?
(A)進行氧化反應
(B)可以防止食物被氧化
(C)利用鐵易與氧氣反應而消耗氧氣,降低包裝內的氧氣濃度
(D)脫氧劑活性小,很難與包裝袋中的氧氣反應
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
日常生活中,許多金屬製品表面會鍍上一層薄薄的鋅,以達到防鏽目
的。關於防鏽作用的敘述,下列何者正確?
(A)鋅不容易氧化,所以可以隔絕氧氣,達到防鏽目的
(B)鋅容易氧化形成緻密氧化鋅,可避免內部金屬氧化而生鏽
(C)如果鍍鋅厚度太厚,對氧的活性太大,反而不能防鏽
(D)鋅能與鐵結合成合金,因而降低鐵的活性,故不易生鏽錫對氧的活性比鐵大,所以鍍錫罐頭能防鏽
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
點燃的鎂,可以在裝有二氧化碳的集氣瓶中繼續燃燒,關於這個現象,下列敘述何者正確?
(A)二氧化碳可以把鎂氧化
(B)二氧化碳可以把鎂還原
(C)碳比鎂更易與氧化合
(D)氧化鎂容易把碳氧化成二氧化碳
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鋅粉與氧化銅粉末在隔絕空氣的條件下,混合加熱的反應如下:
Zn+CuO→ZnO+Cu,下列有關此反應的敘述何者正確?
(A)銅被氧化
(B)與氧結合的活性:鋅<銅
(C)鋅被還原
(D)容易釋出氧:氧化鋅<氧化銅
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
三個相同的廣口瓶內分別裝有氦氣、氧氣和二氧化碳,今將點燃的鎂帶分別放入各瓶中,發現鎂帶在甲、乙瓶中繼續燃燒,在丙瓶中則熄滅,且在甲瓶中同時有黑色與白色的物質產生,試問甲瓶中裝有何種氣體?
(A)氦氣
(B)二氧化碳
(C)氧氣
(D)無法判斷
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在CuO+H2→Cu+H2O反應式中,下列何者被氧化?
(A)CuO
(B)H2
(C)Cu
(D)H2O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一個日常生活現象不屬於氧化還原反應?
(A)金屬生鏽
(B)游泳池採用氯氣消毒,消滅水中的病菌
(C)利用漂白水漂白衣物
(D)小蘇打粉加熱產生氣體
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