10.( )小華進行有機實驗,將有機化合物 CH3CH2CH(OH)CH3用濃硫酸處理後,分離所得之產物(甲),再以 過量的溴與(甲)反應,小華猜測可得到(乙)的可能示性式如下①~④:①CH3CH2C
6.( )某元素 X 有兩種氧化物:XO 與 XO2,其總重量為 4.36 克,總莫耳數為 0.14 莫耳。今以 0.1M KMnO4 酸性溶液將 XO 及 XO2均完全氧化成 XO3 -離子時,共需
5.( )下列三個反應式中的 X 與 Y 分別為兩個金屬元素的代號,Cl 為氯的元素符號:已知三個反應均能向右進行,試據此三個反應式,推測下列物質中哪一個是最強的還原劑? (A)XCl3 (B)XCl
4.( )已知 R、Q、X、Y、Z 都是含有氯元素的化合物,其氧化還原反應如下:(1) Q+H2OX+H2; (2) R → Q+NaCl;(3) Y+NaOH → R+Q+H2O; (4) Z+Na
16. Activity series of selected elements: least activity Which react with dilute sulfuric acid?I. Cu
13. Which factors can affect the rate of reaction? I. Particle size of solid reactant II. Concentrat
14. Which factor does not affect the position of equilibrium in this reaction?2NO2(g) ⇌ N2O4(g) ΔH =
11. The compounds shown below have similar relative molecular masses. What is the correct order of i
9. Which statement is correct? (A) Atomic radius decreases down group 17. (B) First ionization energ
8. Which are correct statements about the emission spectrum of hydrogen in the visible region? I. Th