A.Cl₂                   B.AgNO₃                  C.NaOH                   D.HCl

A.①②③④⑤             B.①③⑤                 C.④⑤                 D.只有①

CaO HgO

A.HBr               B.H₂                   C.O₂                 D.Hg

A.提高汽油燃烧效率                        B.降低汽油成本

C.避免铅污染大气                           D.铅资源短缺

A.温室效应                                 B.硫的氧化物排放

C.白色污染                                 D.碳氢化合物排放

A.Cr₂O₃               B.MnO₂               C.V₂O₅              D.MgO

A.2HgO2Hg+O₂↑                            B.4Al+3MnO₂2Al₂O₃+3Mn

C.2MgO2Mg+O₂↑                       D.4CO+Fe₃O₄3Fe+4CO₂

A.消除硫酸厂尾气排放：SO₂+2NH₃+H₂O(NH₄)₂SO₃

B.消除硝酸工业尾气中的氮氧化合物：NO₂+NO+2NaOH2NaNO₂+H₂O

C.制取CuSO₄：Cu+2H₂SO₄(浓)CuSO₄+SO₂↑+2H₂O

D.制CuSO₄：2Cu+O₂2CuO、CuO+H₂SO₄(稀)CuSO₄+H₂O

①CH₄  ②C₂H₆  ③CH₂=CH₂  ④CH₂=CH—CH₃

A.只有①④               B.只有②③               C.只有①③或②④            D.①②③④都有