①无色溶液中:K+、Cl−、Na+、H2PO、PO、SO
②使pH=11的溶液中:CO、Na+、AlO、NO、S2−、SO
③水电离的H+浓度c(H+)=10−12mol·L−1的溶液中:Cl−、HCO、NO、NH、S2O
④加入Mg能放出H2的溶液中:Mg2+、NH、Cl−、K+、SO
⑤使甲基橙变红的溶液中:Fe3+、MnO、NO、Na+、SO
⑥酸性溶液中:Fe2+、Al3+、NO、I−、Cl−、S2−
A.①②⑤ | B.①③⑥ | C.②④⑤ | D.①②④ |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2