• 2022-06-05
    下列物质的熔点由高到低的顺序为:
    A: C(金刚石) > CuCl2 > H2O > H2S
    B: CuCl2 > C(金刚石) > H2O > H2S
    C: C(金刚石) > CuCl2 > H2S > H2O
    D: CuCl2 > C(金刚石) > H2S > H2O
  • A

    内容

    • 0

      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)

    • 1

      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)

    • 2

      电负性变化正确的是() A: K > Na > Li B: O > Cl > H C: As > P > H D: 三组都对

    • 3

      在下列溶液(1)c(C6H12O6) = 0.1mol/L,(2)c(Na2SO4) = 0.1mol/L,(3)c(NaCl) = 0.1mol/L,(4)c() = 0.1mol/L中,凝固点由高到低的顺序是( ) A: (1)>(2)>(3)>(4) B: (2)>(3)>(4)>(1) C: (1)>(4)>(3)>(2) D: (2)>(4)>(3)>(1)

    • 4

      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)