下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
将下列化合物按极性大小排列顺序:(1)CH4 (2)CH3F (3)CH3Cl (4 )CH3Br (5)CH3I A: (1)>(2)>(3)>(4)>(5) B: (5)>(4)>(3)>(2)>(1) C: (2)>(3)>(4)>(5)>(1) D: (3)>(4)>(5)>(1)>(2)
将下列化合物按极性大小排列顺序:(1)CH4 (2)CH3F (3)CH3Cl (4 )CH3Br (5)CH3I A: (1)>(2)>(3)>(4)>(5) B: (5)>(4)>(3)>(2)>(1) C: (2)>(3)>(4)>(5)>(1) D: (3)>(4)>(5)>(1)>(2)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )
化合物(1)苯、(2)呋喃、(3)吡咯、(4)噻吩分别发生亲电取代反应的活性次序是() A: (1)>(2)>(3)>(4) B: (2)>(1)>(3)>(4) C: (3)>(2)>(4)>(1) D: (4)>(3)>(2)>(1)
化合物(1)苯、(2)呋喃、(3)吡咯、(4)噻吩分别发生亲电取代反应的活性次序是() A: (1)>(2)>(3)>(4) B: (2)>(1)>(3)>(4) C: (3)>(2)>(4)>(1) D: (4)>(3)>(2)>(1)
化合物(1)正丙基氯、(2)乙醚、(3)正丁醇、(4)仲丁醇的沸点由高到低的顺序为() A: (1)>(2)>(3)>(4) B: (3)>(4)>(1)>(2) C: (2)>(3)>(1)>(4) D: (2)>(4)>(1)>(3)
化合物(1)正丙基氯、(2)乙醚、(3)正丁醇、(4)仲丁醇的沸点由高到低的顺序为() A: (1)>(2)>(3)>(4) B: (3)>(4)>(1)>(2) C: (2)>(3)>(1)>(4) D: (2)>(4)>(1)>(3)
(1)环丁酮,(2)环戊酮,(3)3-戊酮在用氢化物还原时,活性次序为: A: (3)>(1)>(2) B: (3)>(2)>(1) C: (2)>(1)>(3) D: (1)>(2)>(3)
(1)环丁酮,(2)环戊酮,(3)3-戊酮在用氢化物还原时,活性次序为: A: (3)>(1)>(2) B: (3)>(2)>(1) C: (2)>(1)>(3) D: (1)>(2)>(3)
从大到小排列下列物质的沸点高低( )(1)正己烷 (2)环己烷 (3)3-甲基戊烷 (4)2-甲基戊烷 A: (1)> (2) > (3) > (4) B: (2)> (1) > (4) > (3) C: (2)> (1) > (3) > (4) D: (1)> (2) > (4) > (3)
从大到小排列下列物质的沸点高低( )(1)正己烷 (2)环己烷 (3)3-甲基戊烷 (4)2-甲基戊烷 A: (1)> (2) > (3) > (4) B: (2)> (1) > (4) > (3) C: (2)> (1) > (3) > (4) D: (1)> (2) > (4) > (3)
下列化合物按碱性由强到弱排列的次序为()。(1) CH3CH2ONa (2) (CH3)3CCH2ONa (3) CF3CH2ONa A: (1)>(2)>(3) B: (3)>(1)>(2) C: (2)>(1)>(3) D: (1)>(3)>(2)
下列化合物按碱性由强到弱排列的次序为()。(1) CH3CH2ONa (2) (CH3)3CCH2ONa (3) CF3CH2ONa A: (1)>(2)>(3) B: (3)>(1)>(2) C: (2)>(1)>(3) D: (1)>(3)>(2)