如圖所示,童軍老師教同學用竹筷削成火媒棒,這是合乎影響反應速率變因中的哪一項因素?

B4C4_反應速率與平衡A卷

Quiz
•
Chemistry
•
8th Grade
•
Medium
chungtsen chen
Used 2+ times
FREE Resource
40 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
降低燃點
使竹筷質量增加
增加竹筷總表面積
增加氧氣濃度
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在燒杯中進行 2H2O2 → 2H2O+O2 的反應,下列敘述何者錯誤?
加入 MnO2 可加速反應速率
MnO2 在反應結束後,質量會減少
使用 30% H2O2 水溶液做此實驗會比 3% H2O2 水溶液的反應速率快
40℃之反應速率比 20℃為快
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有一未平衡的反應式:H2+N2→ NH3,下列有關此反應式的敘述何者正確?〔93. 基測Ⅱ〕
H2、N2 和 Fe2O3 皆為反應物
由此反應式可預測發生此反應的快慢
Fe2O3 在此反應中可以增加生成物的總量
在 H2、N2 和 NH3 前分別加係數 3、1、2 可平衡此反應式
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
取 30℃、0.M 的 Na2S2O3 溶液 2 mL 與錐形瓶中 30℃、1.M 的 HCl 溶液 1 mL 進行反應,60 秒後沉澱會將瓶底下所畫的圖案遮住。若改以 50℃的溶液重複此實驗,15 秒後沉澱會將瓶底下所畫的圖案遮住,則後者實驗的反應速率是前者的幾倍?
1 倍
2 倍
4 倍
8 倍
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