On heating which of the following $$CO_2$$ releases most easily?
On heating, $$MgCO_3,$$ $$CO_2$$ releases most easily. This is due to the small size of the resulting oxide ion.
The radii of the oxide ion and $$Mg^{2+}$$ ion are nearly same and hence they pack together tightly with the result its formation (i.e decomposition of its carbonate) is easy and requires less energy.
Hence the correct option is A.
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 :
Which one of the following alkaline earth metal carbonates is thermally the most stable?
Which of the following will have lowest value of $$K_{sp}$$ at room temperature?