資訊推薦

• 18. Consider a face-centered cubic unit cell. What's the fraction of the space actually occupie
• 19. Which of the following compounds doesn't react with the acidic KMnO4 solution? (A)propa
• 20. Which of the following is optically active (that is, chiral)? (A)dimethylamine (B)difluorom
• 21. When heat is added to proteins, the hydrogen bonding in the secondary structure breaks apart. Wh
• 2. The limiting reactant in a reaction (A)is the reactant for which you have the least number of
• 3. A solution contains the ions Ag+, Pb2+, and Ni2+. Dilute solutions of NaCl, Na2SO4, and Na2S are
• 4. Consider three 1-L flasks at the same temperature and pressure. Flask A contains CO gas, flask B
• 5. Consider the following equilibrium:N2(g) + 3H2(g) ⇄ 2NH3(g)with K = 2.3 × 10-6. 1.00 mol each of
• 6. As water is heated, its pH decreases. This means that (A)[OH-] > [H+]. (B) [H+] >[OH
• 7. The reaction Cr(s) + NO3¯(aq) → Cr3+(aq) + NO(g) takes place in acidic solution.What is the coeff
• 8. For a particular process q = -10 kJ and w = 25 kJ. Which of the following statements is true?
• 9. For the reaction H2O(l) → H2O(g) at 298 K, 1.0 atm, ΔH is more positive than ΔE by 2.5 kJ\/mol.T
• 10. Choose the correct statement. (A)A reaction that exhibits a negative value of ΔS cannot be s
• 11. Consider a solution consisting of the following two buffer systems:H2CO3 ⇌HCO3- + H+ pKa= 6.4 ；
• 12. What is the probability of finding a particle in a one-dimensional box in energy level n = 4 bet
• 13. According to the VSEPR model, the electron pairs around NH3 and those around CH4 are arranged
• 14. Which statement about the thiocyanate ion, SCN-, is true? (A)Only one correct resonance stru
• 2. 下列有關膜分離裝置的敘述，何者錯誤？ (A)微過濾膜的孔洞大小約 0.1~10μm，可過濾病毒 (B)超過濾膜的孔洞小於 100nm，可以去除膠體 (C)滲透操作時，低滲透壓側的水分子會穿透至高
• 3. 下列有關閥之敘述，何者正確？ (A)止回閥用於控制流體流動之開關 (B)在全開狀態下，閥之摩擦損失大小之關係：針閥＞角閥＞閘閥 (C)相較於蝶型閥，角閥更適合用於帶顆粒漿狀流體調節 (D)在調節
• 4. 關於濕度與空氣調節操作，下列敘述何者正確？① 當空氣的濕度越低，其露點越低② 當空氣未達飽和溼度時，其相對溼度小於百分濕度③ 若已知一空氣的濕度及乾球溫度，可由濕度圖求得空氣之濕球溫度④ 將空氣
• 5. 下列有關反應器的敘述，何者錯誤？ (A)旋轉式圓盤反應器最常使用於含有機廢水之處理 (B)管式反應器適合於反應速率慢的、滯留時間短的氣相反應 (C)流體自反應床底部通入，使固體觸媒顆粒懸浮在流體
• 6. 固體乾燥實驗，將一濕物料 40 Kg 置入於 80℃、相對濕度 20%的空氣中進行乾燥， 經長久放置後，秤其平衡時的重量為 25Kg，將此物料放置在 120℃的烘箱中至重量不 再變化為止，測得其
• 7. 已知四氯化碳之正常沸點為 76℃，則由曲吞法則算出四氯化碳之汽化熱為多少 cal\/g ？ (Cl=35.5) (A) 23.82 (B) 47.60 (C) 71.47 (D) 94.77。
• 8. 以拉環法測定某液體之表面張力，若白金拉環之圓周長為 8 公分，欲使拉環恢復原來 水準位置需 1.2g 之物重，則該液體之表面張力為何？ (A) 5.88 (B) 7.35 (C) 58.5 (D
• 9. 焰色實驗中，金屬鹽類燃燒後產生的焰色下列何者正確？ (A)鋰鹽為黃綠色 (B)鈣鹽為藍色 (C)鉛鹽為紅色 (D)鈉鹽為黃色。