Glauber's salt is

Alkali metals dissolve in liquid ammonia to give a blue-colored solution if it is dilute. This blue color is due to which of the following?

Two alkali halide salts,$ACl$ and $BCl$,gave crimson red and violet colors in their flame tests,respectively. $A$ and $B$ are respectively:

Give uses of $sodium$ $hydrogen$ $carbonate$.

The nitrate of which metal does not give nitrogen dioxide on strong heating?

Which of the following reacts with water with the highest rate?