The correct order of increasing thermal stability of `K_(2)CO_(3),MgCO_(3),CaCO_(3),` and `BeCO_(3)` is

Options

A. `I lt II lt III lt IV`
B. `IV lt II lt III lt I`
C. `IV lt II lt I lt III`
D. `II lt IV lt III lt I`

Answer

B

Explanation

`K_(2)CO_(3)` is most stable thermally. Among the others, the stability of the carbonates increases down the group.