
酸性物质与特性
Authored by Fong Tiew
Chemistry
8th Grade
Used 1+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列用紫色牵牛花自制指示剂的有关操作中,一定发生了化学变化的是
捣碎牵牛花花瓣
酒精浸泡碎牵牛花
用纱布滤出牵牛花汁
牵牛花汁滴入醋酸
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
化学知识谜语化可以增添学习化学的乐趣并能增强记忆。现有一则谜语:“老者生来脾气躁,每逢喝水必高烧,高寿虽已九十八,性情依然不可交。”下列最适合作为谜底的物质是
浓硫酸
浓盐酸
氢氧化钠
氧化钙
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一些物质的近似pH为:泡菜3.4、苹果汁3.1、西瓜汁5.8、鸡蛋清7.6,其中显碱性的是
泡菜
苹果汁
西瓜汁
鸡蛋清
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
实验室中下列物质因没有密封保存而使质量减少的是
浓硫酸
氯化钠
浓盐酸
氢氧化钠
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
小明从化学课知道蛋壳的主要成份是碳酸盐,决定制作一个"无壳鸡蛋"送给妈妈,他应从厨房中选择鸡蛋和下列物质的
味精
白酒
酱油
白醋
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
物质世界正在举行一场“才艺”表演,其规则为:同台“献艺”的物质之间, 反应时必须产生能直接观察到的现象。下列物质中能与稀硫酸同台“献艺”的是
氢氧化钠溶液
碳酸钠溶液
氯化钠溶液
二氧化碳
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列各溶液中,呈碱性的溶液是
pH < 7 的溶液
不能使酚酞变色的溶液
使紫色石蕊试液变红色的溶液
使红色石蕊试液变蓝色的溶液
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