最近在練習綜合化學的考古題 不過由於沒有答案 都和幾個一起讀書的朋友討論 有些討論不出來的 想來問問板上的板友們 希望可以幫幫忙!! 先感謝一下! =============以下問題開始========== 1.An increase in comjugation is correlated with _____ in the energy of the LUMO,_____ in the energy of the HOMO,and _____in 入(MAX) (A)a decrease,an increase,a decrease (B)a decrease,an increase,an increase (C)an increase,a decrease,a decrease (D)an increase,a decrease,an increase (E)an increase, an increase,a decrease 這題連題目都不懂再說什麼......還有那個入是波長那個符號 可是我不會打.... 2.Which of the following compounds possesses the so called "three-center bond" (A)solid BeCl4 (B)PCl3 (C)solid BeH2 (D) PH3 不是只有B有"three-center bond"嗎@@? 3.Which one of the following type of elements is most likely to be a good oxidizing agent? (A)alkali mentals (B)transition mentals (C)lanthanides (D)halogens 4.Which of the following extraction technique usually uses the least amount of solvent to extract organic substance? (A)soxhlet extraction (B)microwave assisted extraction (C)solid phase microextraction (D)sonication assisted extraction 這題也是不知道在說什麼..... 5.The rate law for a reaction is found to be rate=k[a]2[b] <==速率式的2是平方 which of the following mechanisms gives this rate law? a. A+B --> E (FAST) <-- E+B ---> C+D (SLOW) b. A+B --> E (FAST) <-- E+A ---> C+D (SLOW) c. A+A ---> E (SLOW) E+B ---> C+D (FAST) (A)a (B)b (C)c (D) a and b (E)none of the above 6.最後這是我自己不是很懂得一個地方, 就是有機的立體化學中 configurational isomer和 diastereomer 兩個的差別是在哪邊?看了很久還是不懂 有沒有版有可以解釋一下 或是舉個例子都可以!! 感謝!!! --

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