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)
A: (1)>(3)>(2)
B: (3)>(2)>(1)
C: (1)>(2)>(3)
D: (3)>(1)>(2)
举一反三
- 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)
- 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 )
- (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)
- 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)