:
1-5:DBABC 6-10:BCBCB 11-15:ABDAB
16-20:CDCAC 21-25:DCBDB 26-30:CBCCD
二、非选择题:
31.① Na, 浅黄 ② 2Na2O2+2H2O =4NaOH + H2
2OH -+CO2=CO32-+ H2O
32. ①S,Cl ②离子 ③AL ④HCLO4
⑤2H2SO4(浓)+Cu=== CuSO4+ SO2 + H2O
33.①C ②B ③A
34.①A ②B ③C
35.①B ②A ③C
36. ①CaCO3+2HCL=CaCL2+ H2O+ CO2
②10.00 ③0.40