質量守恆001_ 練習題1
Quiz
•
Science
•
7th - 9th Grade
•
Practice Problem
•
Medium
鄭之偉 鄭之偉
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
真真操作加熱小蘇打的實驗,如附圖所示,試問真真在「密閉容器」中進行此實驗的主要目的可能為何?
驗證反應前後符合質量守恆定律
使得熱量能存留在試管內加速反應
防止空氣中的氧氣加入反應
讓小蘇打與試管內的氧氣反應完全
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
操作碳酸鈉溶液加氯化鈣溶液的實驗,反應前所有溶液與容器的質量總和為W1,而應後測得總質量為W2。若W1=W2,則由實驗的結果可以說明下列何者?
能量守恆定律
質量守恆定律
阿基米德原理
帕斯卡原理
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
操作碳酸鈉溶液加氯化鈣溶液的實驗,試問碳酸鈉溶液與氯化鈣溶液倒在一起後,會產生何種變化?
產生白色沉澱
溶液由無色轉變為紅色
產生黃色沉澱
溶液由無色轉變為綠色
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將少許的大理石和稀鹽酸裝在試管中,如附圖所示,一段時間後,發現試管的總質量減少,其原因為何?
此反應不遵守質量守恆定律
因為產生了白色沉澱
反應生成的氣體逸散到空氣中
消耗掉一部分的大理石
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將一密閉的化學裝置置於天平上秤量,如附圖所示,當氯化鈣溶液與碳酸鈉溶液混合反應後,下列相關的敘述何者正確?
會有沉澱物產生,重量增加
沉澱物為NaOH
本實驗可用以說明質量守恆定律
天平的右盤會向下傾
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列各化學反應中,何者的總質量會因產生氣體而減輕?
將盛有鹽酸的試管倒入裝有大理石塊的燒杯中
鐵塊在空氣中生鏽
鎂帶在氧氣瓶中燃燒產生氧化鎂
碳酸鈉和氯化鈣兩溶液混合
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鐵生鏽後質量會增加,原因為何?
鐵生鏽是質量守恆定律的例外
測量的天平有問題
空氣中的氧也參加反應
鐵吸收空氣中的二氧化碳
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