过渡元素
Quiz
•
Chemistry
•
10th Grade
•
Medium
wan hawl
Used 13+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
CH3NH2
CN-
Cl-
NH4+
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
最外层电子结构为3d5 4s2的元素 ____ 。
I 可形成配位化合物
II 可形成有色离子
III 可组成多种合金
IV 具有低的熔点
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
下列哪些试剂能使Fe3+变为Fe2+?
I 二氧化硫
II 硫化氢
III 氢溴酸
IV 锡
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
苹果的果肉在空气中会由淡绿色转为黄棕色,现榨的苹果汁中可添加维他命C以防止颜色改变。下列叙述哪些正确?
I 苹果含有丰富的Fe2+
II 维他命C比苹果具有更好的氧化力
III 维他命C在反应过程中当作抗氧化剂
IV 空气易使苹果成分中Fe2+转换为Fe3+
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Fe(OH)3
AgNO3
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
下列何种方法可去除FeCl2溶液中含有的少量FeCl3杂质?
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
铜原子跟铜离子不同,是因为铜原子______。
I 质量较小
II 不带电荷
III 含较少的中子
IV 含较多的电子
8.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
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