The hydroxides which sublime on heating are

Give a brief explanation of the carbonate,sulphate,and nitrate compounds of alkaline earth metal elements.

The compound $A$ on heating gives a colourless gas and a residue that is dissolved in water to obtain $B$. Excess of $CO_2$ is bubbled through aqueous solution of $B$,$C$ is formed which is recovered in the solid form. Solid $C$ on gentle heating gives back $A$. The compound $A$ is:

Which of the following is the correct decreasing order of thermal stability of alkaline earth metal carbonates?

Which of the following substances is the least soluble in water?

Reaction of $BeO$ with ammonia and hydrogen fluoride gives '$A$' which on thermal decomposition gives $BeF_2$ and $NH_4F$. What is '$A$'?