0122_06期_溫故知新
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
Sam Pai
Used 1+ times
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於鹽類敘述何者正確呢?
一定可以溶於水
水溶液呈中性
都是電解質
酸鹼中和都可以得到鹽類
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不是鋅與稀鹽酸反應所產生的實驗結果呢?
溫度上升
產生氣泡
點燃線香靠近產生爆鳴聲
有刺激臭味氣體
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
甲加乙等於丙加丁的反應式中,12公克的甲和10公克的乙,可以產生14公克的丙和多少公克的丁呢?此過程符合哪種定律呢?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪種金屬最容易燃燒,屬於鹼金族,活性大,火焰呈現黃色,燃燒後的氧化物溶於水呈現強鹼性,酚酞指示劑呈現什麼顏色呢?
鎂,紅色
鈉,藍色
鋅,無色
鈉,紅色。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
高爐煉鐵,爐頂放出的氣體主要含有什麼呢?
氫氣,可以做燃料
氧氣,可以做助燃氣
一氧化碳,可以做燃料或還原劑
二氧化碳,可以作燃料或氧化劑
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
關於高爐煉鐵,下列哪些不正確呢?
生鐵適合模型鑄造,熟鐵適合鍛接。
熟鐵含碳量低,鋼鐵的含碳量介於生鐵和熟鐵之間。
碳酸鈣加熱變成氧化鈣,與泥沙混合變成溶渣,密度很大,浮在生鐵上,防止被氧化
一氧化碳和碳都是高爐煉鐵的氧化劑,作氧化作用提煉出鐵。
不鏽鋼是鋼鎳鉻的合金,硬度介於生鐵和熟鐵之間。
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