10分鐘小測:第49章 過渡性金屬的一般性質
Quiz
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪元素不是過渡性金屬?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
碘化鉀溶液與酸化重鉻酸鉀溶液如以下方程式所示反應:
Cr₂O₇²⁻(aq) + 6I⁻(aq) + 14H⁺(aq) → 2Cr³⁺(aq) + 3I₂(aq) + 7H₂O(l)
鉻透過這反應,可展示下列哪些過渡性金屬的一般性質?
(1) 在水溶液中生成有色離子
(2) 在它的化合物中展示可變的氧化態
(3) 在化學反應中展示催化性質
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若在含鉻酸根離子的水溶液中加進酸,所得溶液的顏色會是甚麼?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮以下的還原半方程式:
__MnO₄⁻(aq) + __H⁺(aq) + __e⁻ → __MnO₂(s) + __H₂O(l)
把一摩爾的MnO₄⁻離子還原為一摩爾的MnO₂時,在還原反應中要獲得多少摩爾的電子?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
哪項有關在VO₂⁺(aq)中釩的氧化態和VO₂⁺(aq)的顏色的組合正確?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
哪項有關在MnO₄²⁻(aq)中錳的氧化態和MnO₄²⁻(aq)的顏色的組合正確?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在下列哪過程中,鐵沒有被氧化?
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