A: 1>2>3
B: 2>3>1
C: 3>2>1
D: 3>1>2
举一反三
- 设集合A ={1, 2, 3}, 下列关系R中哪些是等价关系? A: {<1, 1>, <2, 2>, <3, 3>} B: {<1, 1>, <2, 2>, <3, 3>, <3, 2>, <2, 3>} C: {<1, 1>, <2, 2>, <3, 3>, <1, 3>} D: {<1, 1>, <2, 2>, <1, 2>, <2, 1>, <1, 3>, <3, 1>, <3, 3>, <2, 3>, <3, 2>}
- 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)
- 浓度均为0.0l mol/kg 的下列物质的水溶液: (1)NaCl; (2)HAC; (3)Na2SO4; (4)葡萄糖,它们的凝固点从高到低排列顺序是: A: (4) > (2) > (1) > (3) B: (3) > (1) > (2) > (4) C: (1) > (2) > (3) > (4) D: (4) > (3) > (2) > (1)
- 浓度均为0.0lmol·kg-1的下列物质的水溶液: (1)NaCl;(2)HAc;(3)Na2SO4; (4)葡萄糖,它们的凝固点从高到低排列顺序是( ) A: (3) > (1) > (2) > (4) B: (4) > (3) > (2) > (1) C: (4) > (2) > (1) > (3) D: (1) > (2) > (3) > (4)
- 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)
内容
- 0
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
7、空气、水、铁的导热系数分别为λ1,λ2,λ3,一般情况下其大小顺序为( ) A: λ3>λ1>λ2 B: λ3>λ2>λ1 C: λ1>λ2>λ3 D: λ2>λ1>λ3
- 2
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)
- 3
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)
- 4
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)