A.稀H₂SO₄                     B.浓盐酸              C.AgNO₃                    D.Fe₂（SO₄）₃

A.Al                    B.Zn                   C.Fe                  D.Mg

A.Al跟NaOH溶液共热                       B.Al（NO₃）₃跟过量的NaOH溶液

C.Al₂O₃和水共热                             D.Al₂（SO₄）₃和过量的NH₃·H₂O

A.1个金属原子失去电子的多少                B.1 mol金属与酸反应放出氢气的多少

C.1 mol金属失去电子的多少                  D.金属原子失去电子的难易程度

A.Na₂O₂+H₂O                                B.Na₂O+H₂O

C.Na+H₂O                                      D.CO₂+H₂O

A.氧化物                 B.硫酸盐                   C.氯化物                D.碳酸盐

A.加热                                                B.两者分别与同浓度的稀盐酸反应

C.溶于水，比较其溶解性                        D.两者分别加入NaOH溶液或石灰水

A.钠的熔点较低                               B.钠的密度较小

C.钠有强还原性                               D.钠的硬度较小

A.Al-Si合金                                    B.Al-Cu-Mn-Si合金

C.Al-Mg合金                                  D.表面有氧化铝膜的纯铝

A.K                     B.Ca                     C.Na                      D.Fe