食鹽水溶液不小心打翻在地面上後,過了一段時間會發現打翻的地板上有些物體出現,是什麼原因?

五下2-1~2-2前半

Quiz
•
Science
•
5th Grade
•
Hard

Kenny Hsieh
Used 5+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
地板被腐蝕了
食鹽水溶液中的食鹽變質
水分逐漸蒸發,食鹽逐漸出現
以上皆非
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將紫色高麗菜汁分別滴入小蘇打水、汽水、食鹽水、純水四杯水溶液中時,會有幾杯呈現紫色系?
1杯
2杯
3杯
4杯
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在只使用藍色石蕊試紙的情況下,可以檢測出下列哪一種水溶液的酸鹼性呢?
糖水
小蘇打水
石灰水
白醋
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某種水溶液無法使藍色石蕊試紙變紅色,但會使紫色高麗菜汁變成藍綠色系,此種水溶液可能是下列哪一種?
糖水
白醋
石灰水
檸檬汁
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在進行酸鹼中和實驗時,如果想讓呈現紅色系的紫色高麗菜汁變回紫色系,可以加入什麼酸鹼性的水溶液?
酸性水溶液
鹼性水溶液
中性水溶液
以上都可以
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一組水溶液都會讓藍色石蕊試紙變紅色?
食鹽水和白醋
石灰水和食鹽水
白醋和汽水
檸檬汁和糖水
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
桌上有一杯不知名的水溶液,利用五官無法觀察到水溶液的什麼特徵?
顏色
氣味
酸鹼性
透明度
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