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प्रश्न
Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.
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उत्तर
Due to small size and somewhat high ionization enthalpy of Be, Be(OH)2 is amphoteric in nature, i.e., it reacts with both acids and bases. Further, due to small size, the hydration enthalpy of Be2+ ions is much higher than the lattice enthalpy of BeSO4. As a result, BeSO4 is highly soluble in water.
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संबंधित प्रश्न
Discuss the general characteristics and gradation in properties of alkaline earth metals.
The product obtained as a result of a reaction of nitrogen with CaC2 is ______.
Assertion: Generally alkali and alkaline earth metals form superoxides.
Reason: There is a single bond between O and O in superoxides.
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.
In context with beryllium, which one of the following statements is incorrect?
Beryllium halides are covalent whereas magnesium halides are ionic why?
Explain the important common features of Group 2 elements.
Why alkaline earth metals are harder than alkali metals?
The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.
Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is ______.
When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ______.
Discuss the trend of the following:
Thermal stability of carbonates of Group 2 elements.
Discuss the trend of the following:
The solubility and the nature of oxides of Group 2 elements.
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.
Given below are two statements:
Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above statements, choose the most appropriate answer from the options given below.
PbCl4 exists but PbBr4 and Pbl4 do not because of ______.
