10.镁和铝分别跟足量的稀硫酸反应,若要制得相同质量的氢气,则消耗掉镁和铝的质量比是
····························································································································· [ ]
A.8:9 B.4:3 C.16:27 D.3:4
9.把等质量的锌片分别放叭下列各溶液中,充分反应后,溶液质量减少的是·········· [ ]
A.Na2SO4 B.CuSO4 C.H2SO4 D.AgNO3
8.用相同质量的锌和镁分别跟足量的稀硫酸反应,以纵坐标表示生成氢气的质量,横
坐标表示反应时间,符合反应实际的图像是··························································· [ ]
7.在硝酸铜和硝酸银的混合溶液中,加入一定量的铁粉,充分反应后,过滤上述反应的混合物,在滤液中滴加盐酸有白色沉淀产生,则过滤得到的金属是············································································ [ ]
A.Fe、Cu B.Cu C.Fe、Ag D.Ag
6.将金属,R和M分别浸入稀硫酸里,R溶解而M不溶解.将M浸入金属T的硝酸盐溶液里,M的表面析出T。这三种金属由弱到强的顺序是······························································································ [ ]
A.T、R、M B.R、M、T C.T、M、R D.M、R、T
5.下列反应中属于置换反应的是·········································································· [ ]
A.2Cu+O22CuO B.Fe+CuSO4FeSO4+Cu
C.CuO+COCu+CO2 D.NaCl+AgNO3AgCl+NaNO3
4.公元二世纪,我国古代炼丹家魏伯阳著有(简易参同契)是世界上现存最早的一部炼丹专著。书中描写道:“金入于猛火,色不夺精光。”这句话是指黄金的性质在强热条件下·············································· [ ]
A.很稳定 B.很活泼 C.易氧化 D.易还原
3.下列各种材料中,属于有机合成材料的是························································· [ ]
A.钢铁 B.水泥 C.聚乙烯 D.石灰石
l.下列变化属于化学变化的晕················································································· [ ]
A.晾干的咸菜上出魂食盐晶体 B..铜器上生铜绿
C.日光灯通电发光 D.花生油在冬天冻结
2.下列物质中,可由金属跟稀硫酸反应直接制取的是··········································· [ ]
A.Ag2SO4 B.CuSO4 C.Fe2(SO4)3 D.A12(SO4)3
31.还原1克氧化铜所需要的氢气,至少需要多少克含杂质5%的锌跟足量的稀硫酸反应才能获得?