①X与水作用有气泡冒出,得到有色沉淀Y和弱碱性溶液Z;
②沉淀Y与溶液作用,无变化。
下列说法不正确的是( )
A.混合物X中必定含有,不含 |
B.溶液Z中溶质主要是钠盐,且必含 |
C.灼烧沉淀Y,可能得到黑色物质 |
D.往溶液Z中加入Cu粉,若不溶解,说明X中不含 |
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