
复习 初三上册 复习 part 4
Authored by Sheng Hao Tan
Science
7th - 9th Grade
Used 41+ times

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21 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
酸雨会腐蚀物品和装饰品,导致物品外观受影响。下列物品或装饰品,不易受酸雨腐蚀的是
大理石雕像
铸铁栏杆
铝合金窗框
塑料制品
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
人类很早以前就发现有些物质能呈现酸性,并为酸性物质进行了归类。下列物质属于酸的是
HCI
Ca(OH)2
MgO
CO
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
实验室常见的三种酸分别是硫酸、盐酸和硝酸。下列说法正确的是
打开盛浓盐酸的试剂瓶,瓶口会产生白雾
将浓硫酸曝露久置在空气中,溶液的浓度会变大
盐酸能使紫色石蕊试液变蓝
实验室可用浓硝酸与铁反应制取氢气
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
氢气有许多用途,其中液氢就可用做推进火箭的燃料,让人类探索外空。液态氢气能作为火箭燃料的原因是
氢气的化学性质穏定
氢气燃烧时放热多
氢气没有颜色
氢气没有气味
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
氢气虽然不是空气中的成分,但因为氢气的性质因素,所以是工业上经常被利用的气体。下列关于氢气的性质的叙述,其中不正确的是
用试管收集氢气,将管口靠近本生灯,如果听到尖锐的爆鸣声,表明氢气不纯
氢气的密度非常小,是世界上已知的最轻的气体
氢气极易溶于水,所以不可以用排水集气法收集氢气
氢气在空气里的燃烧,实际上是与空气里的氧气发生反应,生成水
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
餐饮班的学生在厨房里负责今日教师节的美食,其中最受好评的是涂上人造奶油的小点心。将液态棕油制成固态的人造奶油(硬化油)所用的方法是
催化加氢
冷冻处理
乳化作用
氧化作用
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
义卖会中,林老师带领科学小组制作氢气售卖氢气球。实验室中氢气可以用()制取。
铜和稀硫酸
铁屑和盐酸
锌和硝酸
氧化锌和盐酸
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