
Chemistry Section
Authored by Mary Chu
Chemistry
9th Grade

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38 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在室温下为液体的元素符号是:
Hg
Ag
Au
Ga
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
可能的相对原子质量:H-1 C-12 O-16 Na-23 Cl-35.5 K-39 Cu-64 22. 以下哪一项是纯物质?
河水
蒸馏水
矿泉水
盐水
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在纸张生产中用作漂白剂的物质是:
氧气
漂白粉
活性炭
臭氧
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
可能的相对原子质量:H-1 C-12 O-16 Na-23 Cl-35.5 K-39 Cu-64 24. 以下哪一项是无机物质?
葡萄糖
淀粉
氨
蔗糖
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
硼酸酐 (B2O3) 是制造耐热玻璃的原料。元素 (B) 在 B2O3 中的氧化态是:
+3
+2
-3
-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
与常用名称(俗名)相匹配的化学式是:
熟石灰:Ca(OH)2
蓝矾:CuSO4
三氧化二铁:FeCl2
纯碱:Na2CO3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
主要的能源来源是:
石油
煤炭
天然气
氢气
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