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The sequence of hydration enthalpy in following ion is ...
Hydration enthalpy depends on ionic potential as the ionic potential increases hydration enthalpy increases
In case of alkali metals, the covalent character increases in the order :
Among the following the least thermally stable is ?
$ Li_2CO_3 is not so stable towards heat, being small in size, it is decompose into Li_2O and CO_2.$
Which of the following characteristics is not related to alkali metals ?
Fill in the blanks with proper option given below for the following statement. “All the halides of alkaline earth metals with exception of ‘‘ ’’ are ionic in nature.â€
$ K_2CO_3 $ can not be prepared by solvay ammonia process because
The reaction of Cl2 with X gives bleaching powder X is ....
Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy ?
The hydration enthalpy of $ Be^{2+ }and Mg^{2+}$ ions is more than the lattice enthalpy and so they are soluble in water.
A compound (A) on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 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 is ...
$ CaCO_{3(s) }\xrightarrow [] {\triangle } CO_{2(g)} + CaO_{(s)} $ (A) $ CaO_{(s)} +0 H2O_{(1)} \rightarrow Ca(OH)_{2(aq)}$ (B) $ Ca(OH)_{2(aq)} + 2CO_{2(g)} \rightarrow Ca(HCO_3)_{2(aq)} $ (C) $ Ca(HCO_3)_{2 (aq)} \xrightarrow [] { \triangle } CaCO_{3(s)} + CO _{2 (g)} + H_2O_{(1)} $ (A)
Which of the following compounds is most stable ?
Because of the small size of Li and F, LiF has highest lattice enthalpy and hence most stable.
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