Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals.

Nitrates

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Carbonates

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Sulphates

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none of these

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Solution

The correct option is B Carbonates
Carbonates
Thermal stability
The carbonates of alkali metals are stable towards heat. However, carbonate of lithium, when heated, decomposes to form lithium oxide. The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide.
Solubility
Carbonates of alkali metals are soluble in water with the exception of Li2CO₃. Also, the solubility increases as we move down the group. Carbonates of alkaline earth metals are insoluble in water.

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Similar questions

Q. Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates, (b) Carbonates, (c) Sulphates.

Q. Compare the solubility and thermal stability of alkali metals carbonates with those of the alkaline earth metals nitrates.

Present a comparative account of the alkali and alkaline earth metals with respect to the following charactieristics.

(i) Tendency to form ionic / covalent compounds

(ii) Nature fo oxides and their solubility in water

(iii) Formation of oxosalts

(iv) Solubility of oxosalts.

(v) Thermal stability of oxosalts.

Q. Which of the following statements are correct?
I. The (-ve) value of

△ H

for the dissolution of ionic compound is enough to predict the compound solubility in water at any temperature.
II. For the alkali metals carbonate, solubility order decreases down the group.
III. For the alkali metals ozonide, the thermal stability order increases down the group.
IV. For the alkaline earth metals nitride, the thermal stability order increases down the group

Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides.

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