1绝密★启用前2019-2020学年上学期高三年级第四次考试化学试题第Ⅰ卷(选择题共54分每题3分)题号123456789答案ABDACBABB题号101112131415161718答案CBDDADCBC第Ⅱ卷(选择题共46分每空2分)19(10分)【答案】小于4KClO33KClO4+KClCaSO32MnO4-+5SO2+2H2O=2Mn2++5SO42-+4H+2.1×10-220、(12分)【答案】饱和食盐水e→f(或f→e)→c→b→d2NOCl+H2O=2HCl+NO+NO2O2(或NO2)HNO3(浓)+3HCl(浓)=NOCl↑+Cl2↑+2H2O310bc1065.5m×100%21(12分)【答案】NO2(g)+O(g)═NO(g)+O2(g)△H2=+57.2kJ/mol低于cn/30.00592mol•L-1•s-1增加9g22、(12分)【答案】5Ni+12H++2NO3-=5Ni2++N2↑+6H2O①2H2S+Cu2+=CuS↓+2H+过量的F-在酸性条件下会腐蚀陶瓷容器98.3%