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下-單元3_水溶液的性質

Authored by lin johnarp5806

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6th Grade

下-單元3_水溶液的性質
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59 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

用鼻子辨別水溶液的氣味時,可以用鼻子直接靠近水溶液聞氣味。

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

為了減少實驗的誤差,科學家在實驗室常用純水來配製水溶液。

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

不同的水溶液,顏色看起來可能不同,例如:白開水是透明的,紅茶是深褐色的。

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

配製水溶液前,可以先利用純水將容器洗滌乾淨。

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

對於不清楚來源的水溶液,如果無法利用目視、聞嗅來判斷,可以直接用小拇指指尖輕輕觸碰水溶液,觀察水溶液的變化。

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

生活中有些酸、鹼水溶液具有腐蝕性,如果不小心沾到身體,應該用大量清水沖洗並立即送醫。

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

將純水塗抹在紅色石蕊試紙上,會發現紅色石蕊試紙變藍了。

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