Which one of the following alkaline earth metal carbonates is thermally the most stable?
Barium carbonate is thermally the most stable. On moving down the group, the electropositive character of alkaline earth metals increases. Due to this, their thermal stability also increases. The smaller the positive ion, the higher the charge density, and the greater effect it will have on the carbonate ion. As the positive ions get larger down the group, their affect on the carbonate ions near them decreases. More heat must be supplied for the carbon dioxide to leave the metal oxide. In other words, the carbonates become more thermally stable down the group. Hence, $$BaCO_3$$ is the most stable.
In the following table are given eight elements, $$A, B, C, D, E, F, G$$ and $$H$$ (here letters are not the usual symbols of the elements) of the Modern Periodic Table with the atomic numbers of the elements in parenthesis. Period Group $$1$$ Group $$2$$ $$2$$ $$A(3)$$ $$E(4)$$ $$3$$ $$B(11)$$ $$F(12)$$ $$4$$ $$C(19)$$ $$G(20)$$ $$5$$ $$D(37)$$ $$H(38)$$ Out of the three elements $$B, E,$$ and $$F$$, which one has the biggest atomic size?
The metal carbonate which decomposes easily on heating is:
Which of the following does not exist in solid state?
The compound insoluble in acetic acid is :**
The correct order of the solubility of alkaline-earth metal sulphates in water is:
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
The decomposition temperature is maximum for:
Solubility of the alkaline earth's metal sulphates in water decreases in the sequence :
On heating which of the following $$CO_2$$ releases most easily?
Which of the following will have lowest value of $$K_{sp}$$ at room temperature?