
J3_C1_test
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
1188 KIE
Used 7+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
常温下下列稀酸中与较活泼金属反应不能生成氢气的是
盐酸
硫酸
硝酸
磷酸
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
酸类物质具有相似的化学性质的原因是
组成中都含有氢元素
组成中都含有酸根
水溶液中都含有氢离子
水溶液都有酸味
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下图分别为稀释浓硫酸和过滤操作的实验装置图,图A中a应为_______。
浓硫酸
水
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
醋酸、柠檬酸等是食品加工中常用的酸,它们在水中都能电离生成
OH-
Cl-
H+
SO42-
5.
OPEN ENDED QUESTION
2 mins • Ungraded
胃液中含有适量的盐酸。由于胃酸过多而引起的胃痛,可服用含有Mg(OH)2的药物来中和过多的胃酸,发生反应的化学方程式为?
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6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
有一食品包装说明书中注明防腐剂是苯甲酸(C6H5COOH), 张华同学查资料得知苯甲酸的酸性比醋酸强,可用做食品防腐剂。下列对苯甲酸性质的推测中不合理的是
苯甲酸溶液的pH小于7
相同浓度的苯甲酸溶液的pH比醋酸的pH大
苯甲酸溶液能使紫色石蕊试液变红
苯甲酸溶液不能使无色酚酞试液变色
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
以下为小咩用某酸除铁锈的化学反应方程式:Fe2O3+6X---->2FeCl3+3H2O。小咩使用的是什么酸?
硝酸
盐酸
碳酸
硫酸
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