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प्रश्न
An element of group 2 forms covalent oxide which is amphoteric in nature and dissolves in water to give an amphoteric hydroxide. Identify the element and write chemical reactions of the hydroxide of the element with an alkali and an acid.
उत्तर
In group 2, only beryllium is amphoteric in nature which means it reacts with both acids and bases. Also, beryllium only forms covalent oxide due to the covalent nature. So, the element is beryllium.
It reacts with acid to form beryllium chloride and it reacts with base to form beryllate ion which is soluble in sodium hydroxide. The reaction is shown below.
\[\ce{Be(OH)2 + 2OH- -> [Be(OH)4]^{2-}}\]
\[\ce{Be(OH)2 + 2HCl -> BeCl2 + 2H2O}\]
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संबंधित प्रश्न
The product obtained as a result of a reaction of nitrogen with CaC2 is
Assertion: BeSO4 is soluble in water while BaSO4 is not
Reason: Hydration energy decreases down the group from Be to Ba and lattice energy remains almost constant.
Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.
Beryllium halides are covalent whereas magnesium halides are ionic why?
Why alkaline earth metals are harder than alkali metals?
Identify the correct formula of halides of alkaline earth metals from the following.
(i) BaCl2.2H2O
(ii) BaCl2.4H2O
(iii) CaCl2.6H2O
(iv) SrCl2.4H2O
Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.
Discuss the trend of the following:
Thermal stability of carbonates of Group 2 elements.
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.
PbCl4 exists but PbBr4 and Pbl4 do not because of ______.
