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प्रश्न
Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition.
पर्याय
BeCO3
MgCO3
CaCO3
BaCO3
उत्तर
BeCO3
Explanation:
Due to least electropositive character or least basicity of Be, BeCO3 is less stable and hence decomposes to give BeO and CO2.
\[\ce{BeCO3 -> BeO + CO2}\]
Since the decomposition reaction is reversible, therefore, to increase the stability of BeCO3 or to reverse the above equilibrium, BeCO3 is kept in an atmosphere of CO2.
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संबंधित प्रश्न
Draw the structure of BeCl2 (vapour).
Draw the structure of BeCl2 (solid).
Present a comparative account of the alkali and alkaline earth metals with respect to the following characteristics:
(i) Tendency to form ionic/covalent compounds
(ii) Nature of oxides and their solubility in water
(iii) Formation of oxosalts
(iv) Solubility of oxosalts
(v) Thermal stability of oxosalts
Which of the following alkaline earth metal sulphates is least soluble in water?
The structures of beryllium chloride in the solid state and vapour phase, are ______.
Given below are two statements:
Statement I: Both CaCl2.6H2O and MgCl2.8H2O undergo dehydration on heating.
Statement II: BeO is amphoteric whereas the oxides of other elements in the same group are acidic.
In the light of the above statements, choose the correct answer from the options given below:
An inorganic salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide. The solution contains _______.
Ca, Ba and Sr ions are precipitated in fifth group as their ______.
Halides of alkaline earth metals form hydrate such as MgCl2.6H2O, CaCl2.6H2O, BaCl2.2H2O and SrCl2.2H2O. This shows that halides of group 2 elements:
Number of amphoteric compound among the following.
