S3化學第三段測試複習
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
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21 questions
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1.
FILL IN THE BLANK QUESTION
45 sec • 5 pts
利用分餾法對混合物的各組分進行分離,是基於各組成的______不同,因此在不同溫度下可獲得不同組分。
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
自然界中氫元素的同位素中相對豐度最高的是氘。
True
False
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
進行液態空氣的分餾時,從分餾柱中由上至下獲得的氣體依次為
氮氣,氬氣,氧氣
氧氣,氮氣,氬氣
氮氣,氧氣,氬氣
氬氣,氧氣,氮氣
4.
MULTIPLE SELECT QUESTION
45 sec • 5 pts
下列選項中,在化學反應發生前後可能會變化的是______。
分子數目
分子種類
反應前後物質的總質量
原子數目
物質的狀態
5.
MULTIPLE SELECT QUESTION
45 sec • 5 pts
質量守恆定律成立的本質是因為從微觀角度而言,化學反應前後原子的( )沒有發生變化。
種數
數目
形成分子的數目
質量
形成物質的種數
6.
MULTIPLE SELECT QUESTION
45 sec • 5 pts
下列有關質量守恆定律,陳述正確的選項是
質量守恆定律的「守恆」指的是質量守恆,其它方面不一定守恆
根據質量守恆定律,1 升的氧氣與 1 升的氫氣完全反應可生成 2 升的水
鐵絲在氧氣中燃燒,生成的四氧化三鐵的質量等於參加反應的鐵絲和所消耗的氧氣的質量之和
參加反應的氫氣和氧氣的總質量,一定等於生成的水的質量
7.
MULTIPLE SELECT QUESTION
45 sec • 5 pts
下列選項中,在化學反應發生前後一定會變化的是______。
元素種類
分子種類
物質的種類
原子種類
物質的狀態
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