阿摩線上測驗
登入
首頁
>
學士後西醫-化學
>
91年 - 58學士後西醫化學91化學#86891
> 試題詳解
11.The number of possible dichloronitrobenzene isomers is
(A)3
(B)4
(C)6
(D)8
(E)9
答案：
登入後查看
統計：
A(0), B(0), C(3), D(0), E(0) #2348042
詳解 (共 1 筆)
各選項詳解（已上榜）
B1 · 2021/09/23
#5107686
(共 1 字，隱藏中）
前往觀看
3
0
其他試題
7.(S)(+)-Butanol shows a specific rotation at +13.52° . What is the ratio of (S)(+)-Butanol and (R)(-)-butanol when the measured rotation equals to +6.76° ? (A)(S):(R) = 4:1 (B)(S):(R) = 2:1 (C) (S):(R) = 1:2 (D)(S):(R) = 1:2.5 (E)(S):(R) = 3:1
#2348038
8.Calculate the DG for the reaction, 2SO2(g)+O2→2SO3(g):SO2=- 300.4kJ /mol;SO3= 370.4kJ /mol (A)-70.0kJ (B)+70.7kJ (C)-670.8kJ (D)-140.0kJ (E)+140.0kJ
#2348039
9.Which of the following terms best describes the pair of compound shown: (A)enantiomers (B)diastereomers (C)meso compounds (D)same compound (E)threo-erythro isomer
#2348040
10.For the following reactions the major products are shown: (A)kinetic thermodynamic (B)thermodynamic kinetic (C)kinetic kinetic (D)thermodynamic thermodynamic (E)none of these
#2348041
12.Which of the following compounds has a double bond that is conjugated with the p system of the benzene ring? (A)p-Benzyltoluene (B)2-Phenyl-1-decene (C)3-Phenylcyclohexene (D)3-Phenyl-1,4-pentadiene (E)None of these
#2348043
13.Consider the following statements concerning the effect of a trifluromethyl group-CF3, on an electrophilic aromatic substitution. Which of these statements is (or are) correct? 1.The CF3 group will activate the ring. 2.The CF3 group will deactivate the ring. 3.The CF3 group will be a meta director. 4.The CF3 group will be an ortho, para director. (A)1,3 (B)1,4 (C)2,3 (D)2,4 (E)3,4
#2348044
14.All the following groups are activating ortho, para directors when attached to a benzene ring EXCEPT O (A) (B)－OCH3 (C)－C1 (D)－N(CH3)2 (E)None of these
#2348045
15.The 1H nmr spectrum of acetone consists of a singlet with a chemical shift of 2.07 ppm. What was the spectrometer frequency of the instrument used if this chemical shift equaled 186Hz? (A)60MHz (B)90MHz (C)100MHz (D)120MHz (E)Need more information to determine
#2348046
16.The following problem refers to the 1H nmr spectrum of CH3CH2OCH2OCH2CH3. (A)12 (B)5 (C)4 (D)3 (E)6
#2348047
17.The relationship between magnetic field strength and the energy difference between nuclear spin states is: (A)The are independent of each other. (B)They are directly proportional. (C)They are inversely proportional. (D)They relationship varies from molecule to molecule. (E)None of these.
#2348048
阿摩線上測驗
登入
