未分類

63. What is the structure of the final product?

64. What is the structure of the final product?

65. What is the major product of the following four components’ reaction?

66. In the following reaction, which compound is the major product?

67. What is the major product of the following reaction?    (E) None of the above.

68. In the following reaction, which compound is the major product?

69. What is the final product of the following sequential reactions?

70. Consider the reaction given below, which of the following is not applicable to this reaction?  (

71. In the following reaction, which compound the major product?

72. In the following sequential reactions, what is the final product?

73. What is the structure of the final product?

74. How could the following transformation be accomplished? (E) All of the above.

75. In the following reaction, which compound is the major product?

76. In the following reaction, which compound is the major product?

77. Photochemical reaction of 7-dehydrocholesterol to vitamin D3 involves two types of pericyclic re

78. What is the final product of the following reaction?

79. What is the major product of the following transformation?

80. What is the final product?

1. 下列何種化合物可以溶於 CCl4？(A) H2O (B) NaCl (C) C6H14 (D) Ca(OH)2

2. 有一化學電池：Pt(s) | H2(g) | H+(aq) || Ag+(aq) | Ag(s)下列何種化學方程式可以呈現此一電池的反應？(A) H2(g) + 2Ag(s) ⇀ H+(aq)

3. 下列何種儀器可以測量輻射粒子？(A) 電流計 (B) 蓋革計數器(Geiger counter)(C) 酸鹼檢測儀 (D) 電壓計

4. 若在 1000°C 時，反應式 CO(g) + 2H2(g)⇌ CH3OH(g) 的 Kp = 1.0 x 10-7，請計算此反應式於 1000°C 時的△G°。(R = 8.314 J/ mo

5. 為了配製 pH = 8.4 的亞硝酸鈉溶液(sodium nitrite)，請問需有多少克的亞硝酸鈉溶於 700 mL 的水中？[Ka (HNO2) = 5.6 x 10-4](A)16.60g

6. 磷酸(H3PO4)的三個游離常數分別為 Ka1 = 7.5 x 10－3；Ka2 = 6.2 x 10－8；Ka3 = 4.8 x 10－13。若想要配置 pH = 3.5 左右的緩衝溶液，下列

7. 若一放射性元素其 beta decay 的反應速率常數為 2.78 x 10–2/day，該核素(nuclide)之半衰期為？(A) 4.01 x 10–1 天 (B) 1.80 x 101 天

 3690   首頁 上一頁 27 28 29 30 31 32 33 34 35 36 下一頁 尾頁