The compound which gives off oxygen on moderate heating is

$A$ hydrated solid $X$ on heating initially gives a monohydrated compound $Y$. $Y$ upon heating above $373 \ K$ leads to an anhydrous white powder $Z$. $X$ and $Z$,respectively,are

Choose the correct order.

Which of the following compounds is/are used for oxygenating the submarine or spaceshuttle?

The incorrect order of solubility in water is

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals: $(i)$ Nitrates,$(ii)$ Carbonates,$(iii)$ Sulphates.