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:What is the overall charge on the complex ion formed by iron(II) and six cyanide ions,?CN-?
A. 4+
B. 4–
C. 8–
D. 8+
題目難度:簡單。
考點分析:考查complex ion
題目分析:首先根據題意1個iron(II)結合6個cyanide ions,列式計算:(+2)+(-1)*6=-4,所以答案選B。
正確答案:B
題目2:Which property increases down group 1 of the periodic table?
A. Melting point
B. First ionization energy
C. Atomic radius
D. Electronegativity
題目難度:簡單。
考點分析:考查periodic table的trend
題目分析:down group 1 of the periodic table, atomic radius increases, melting point decreases, first ionization energy decreases, electronegativity decreases(電負性降低,金屬性升高)。
正確答案:C
題目3: One of the main constituents of acid deposition is sulfuric acid. This acid is formed from the sulfur dioxide pollutant.A mechanism proposed for its formation is:


(c) Sketch the potential energy profile for the forward reaction in part (b) to show the effect of a catalyst on the activation energy.

題目難度:簡單。
考點分析:考查energy profile
題目分析:part b的反應forward是放熱的,所以products的能量低于reactants,然后再把activation energy給畫上即可(有催化劑的矮,無催化劑的高)。
正確答案:

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