IBDP化学课程真题讲解（1）

通常而言，IBDP 化学被视作一门比较难的学科。但对于一些小伙伴而言，IB化学却并不那么难。这两者并不矛盾。今天带着大家一起看一道IBDP化学课程的真题：选择题（HIGHER LEVEL PAPER 1）。这道题取自于IBDP chemistry specimen paper。

题目1：Which statement about transition metal complex ions is correct?

A. The difference in energy of the d orbitals is independent of the oxidation state of the metal.

B. The colour of the complex is caused by light emitted when an electron falls back from a higher to a lower energy level.

C. The colour of the complex is the colour of the light absorbed when an electron moves from a lower to a higher energy level.

D. The difference in energy of the d orbitals depends on the nature of the ligand.

题目难度：简单。

考点分析：考查complex ion

题目分析：A选项oxidation state of the metal是会影响differencein energy of the d orbitals的，所以错误；B选项是electron被excited到higher energy level所吸收的光的补色，即为complex的颜色，所以错误；C选项同上，错误；D选项正确。

正确答案：D

题目2：Which element is in group 2?

题目难度：简单。

考点分析：考查group 2的ionization energy

题目分析：group 2最外层有2个电子，所以前2个电子失去的时候所需能量相差不大，但是第2个和第3个相差较大，B选项的第2个数和第3个数相差较大，所以是属于group 2的element，所以答案选B。

正确答案：B

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