A.若滤液为无色,则滤渣中一定有银和锌,可能有铜 |
B.若滤液为蓝色,则滤液中一定有Cu2+、Zn2+,可能有Ag+ |
C.若往滤渣中加入稀盐酸有气泡产生,则滤液中一定有Zn2+、Ag+,可能有Cu2+ |
D.若往滤液中加入稀盐酸有白色沉淀产生,则滤渣中一定有银和铜,可能有锌 |
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