IBDP化學課程真題講解（1）

通常而言，IBDP 化學被視作一門比較難的學科。但對于一些小伙伴而言，IB化學卻并不那么難。這兩者并不矛盾。今天帶著大家一起看一道IBDP化學課程的真題：選擇題（HIGHER LEVEL PAPER 1）。這道題取自于IBDP chemistry specimen paper。

題目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.

題目難度：簡單。

考點分析：考查complex ion

題目分析：A選項oxidation state of the metal是會影響differencein energy of the d orbitals的，所以錯誤；B選項是electron被excited到higher energy level所吸收的光的補色，即為complex的顏色，所以錯誤；C選項同上，錯誤；D選項正確。

正確答案：D

題目2：Which element is in group 2?

題目難度：簡單。

考點分析：考查group 2的ionization energy

題目分析：group 2最外層有2個電子，所以前2個電子失去的時候所需能量相差不大，但是第2個和第3個相差較大，B選項的第2個數和第3個數相差較大，所以是屬于group 2的element，所以答案選B。

正確答案：B

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