未吃完的飯菜應該如何保存較不易腐敗?

國二下理化Chap4-1反應速率 2025 0217

Quiz
•
Chemistry
•
8th Grade
•
Hard
Sone Wang
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
埋到土壤中保存
放在室溫下保存
放在冰箱中保存
放在潮濕處保存
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
對於催化劑的敘述,下列何者錯誤?
又稱為觸媒
主要功能為改變反應速率
生物體內也有許多催化劑
唾液中的澱粉酶,可將蛋白質分解成胺基酸。
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
有關國慶日煙火的施放,下列敘述何者正確?
煙火爆炸屬於緩慢的化學反應
煙火爆炸屬於溫和的化學反應
煙火爆炸屬於一瞬間、快速的化學反應
煙火爆炸屬於需要長時間才能發現變化的化學反應
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
大部分的加油站其油庫均建置在地底,其主要原因為何?
可降低溫度,避免發生危險
減少建築空間
節省成本
較具隱密性
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將2毫升的10﹪鹽酸稀釋成10毫升的水溶液裝在甲試管中,另外再由甲試管取5毫升裝在乙試管中,取顆粒大小、質量一樣的大理岩,加入甲、乙兩支試管中,則哪一支試管冒出氣泡的速率最快?
甲試管
乙試管
一樣快
無法判斷
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
一般化學反應,若希望加快反應速率,可以將溫度如何改變?
降低
升高
保持固定
升高、降低都可以。
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
下列情況中,何者反應速率最快?
大塊木頭在空氣中燃燒
碎木片在空氣中燃燒
大塊木頭在純氧中燃燒
碎木片在純氧中燃燒
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