問題詳情
65.Which of the following alcohols gives the best yield of diakyl ether on being heated with a trace of sulfuricacid?
(A)1-Pentanol
(B)2-Pentanol
(C)Cyclopentanol
(D)2-Methyl-2-butanol
(E)2-Ethyl-propanol
(A)1-Pentanol
(B)2-Pentanol
(C)Cyclopentanol
(D)2-Methyl-2-butanol
(E)2-Ethyl-propanol
參考答案
無參考答案
內容推薦
- 【題組】What is the smoking iron horse?(A) The beasts.(B) The passing train.(C) The buffaloes.(D) Th
- Arrange the following intermediates in order of decreasing basicity (strongest→weakest):(A)B >
- Hydrogenation of cyclohexene releases 120kJ/mol of heat. Which of the following most likely repre
- Which of the following produces a significant amount of acetylide ion on reaction with acetylene?
- 下列何者是 22x7 - 83x6 + 21x5 的因式？(A) 2x + 3(B) x2(11x - 7)(C) x4(11x - 3)(D) x6(2x + 7)
- Which alkyne yields butanoic acid (CH3CH2CH2CO2H) as the only organic product upon treatment with
- 如圖(十六)，有兩全等的正三角形 ABC、DEF，且D、A 分別為 △ABC、△DEF 的重心。固定D 點，將 △DEF 逆時針旋轉，使得A 落在 上，如圖(十七)所示。求圖(十六)與圖(十七
- (28~30)【題組】Why did Chief Seattle ask “Every part of the Earth is sacred to my people?”(A) Becaus
- 如圖(十二)，圖上有B、C兩點 為圓的兩切線。若 將圓分成兩弧，且其中一弧的長為圓周長的1/10，則∠BPC的度數為何？(A)108(B)120(C)144(D)162
- Referring to the following equilibrium (R=alkyl group) (A)K < 1 ; the equilibrium would lie th
內容推薦
- A:Is _____ seven fifteen? B: You are right. Let’s go to school.(A)it (B)X (C)that (D)this
- 如圖(十三)，將正五邊形ABCDE的C點固定，並依順時針方向旋轉，則旋轉幾度，可使得新五邊形A'B'CD'E'的頂點D'落在直線BC上？(A)
- Kitty _____ a good cat. She’s jumping up and down on Mom’s new sofa. Mom is so angry.(A)be (B)is (
- _____ Christmas Eve, everyone in our family _____ having a good time.(A)In; is (B)On: is (C)In; a
- 六、閱讀文章回答問題: 每題 2 分，共 6%【題組】How many rules are there in Class 116?(A)Eight. (B)Nine. (C)Six. (D)Fi
- 如圖(十)，將五邊形ABCDE沿直線BC往下平移，使得新五邊形A'B'C'D'E'的頂點B'與C重合。若∠A=103°，∠E=110
- Find the tangent of the curve x3-x2y2+y3=5 at point (1, 2). (A)5x + 24y − 53 =0 (B)5x − 24y + 4
- 【題組】(A)to (B)and (C)with (D)for
- 【題組】(A)funny (B)busy (C)young (D)strong
- 【題組】(A)for (B)to (C)at (D)in
- 【題組】(A)What day (B)What (C)What time (D)Where
- It’s half past five. (選出相同意思的句子)(A) It’s five twenty. (B) It's five thirty.(C) It's fou
- It’s a quarter to eight. (選出相同意思的句子)(A) It’s eight fifteen. (B) It’s eight forty-five.(C) It’s se
- A: _____________ B: It’s three o’clock.(A) What is it? (B) What time it is?(C) What’s the time?
- 選出正確的句子。(A) Please John, come here.(B) Please come here, John.(C) Come here, John, please.(D) Jo
- Please ______ quiet and ______ here.(A) do; wait (B) x; waiting(C) be; wait (D) be; waiting
- Tom: ______ Helen doing now?Sam: She is dancing.(A) What’s (B) How’s (C) Who’s (D) Where’s
- A: ______ is Kenneth talking to? B: His daughter.(A) Who (B) What (C) Where (D) How
- A: Are you ready ______ the concert?B: Yes, let’s go.(A) from (B) for (C) about (D) to
- Let’s ______ eat ______ drink in class.(A) no; and (B) not; and (C) no; or (D) not; or
- A: ______ is Mimi ______ fish? B: Under the sofa.(A) Where; is eating (B) Where; eating(C) What;
- Listen! My favorite song ______.(A) play (B) playing (C) is playing (D) plays
- 【題組】Why did Kobe say “I’m ready to let you go”?(A) Because his heart can’t stand it.(B) Because
- 【題組】What can we learn from this letter?(A) Great passion can keep you going on.(B) Honesty is th
- A: ______ Eva and Leo making?B: They’re making a card.(A) What are (B) What is (C) Are (D) Where