Advertisements
Advertisements
प्रश्न
Discuss the trend of the following:
The solubility and the nature of oxides of Group 2 elements.
Advertisements
उत्तर
All the alkaline earth metals form oxides of formula MO. The oxides are very stable due to high lattice energy and are used as refractory material. Except BeO (predominantly covalent), all other oxides are ionic and their lattice energy decreases as the size of cation increases.
The oxides are basic and basic nature increases from BeO to BaO (due to increasing ionic nature).
`ubrace(BeO <)_("Amphoteric") ubrace(MgO <)_("Weakly basic") ubrace(CaO < SrO < BaO)_("Strongly basic")`
BeO dissolves both in acid and alkalies to give salts and is amphoteric.
The oxides of the alkaline earth metals (except BeO and MgO) dissolve in water to form basic hydroxides and evolve a large amount of heat. BeO and MgO possess high lattice energy and thus are insoluble in water.
APPEARS IN
संबंधित प्रश्न
Discuss the general characteristics and gradation in properties of alkaline earth metals.
Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
The product obtained as a result of a reaction of nitrogen with CaC2 is ______.
Which of the following has the highest hydration energy
Assertion: Generally alkali and alkaline earth metals form superoxides.
Reason: There is a single bond between O and O in superoxides.
In context with beryllium, which one of the following statements is incorrect?
Write a balanced chemical equation for the following chemical reaction.
Rubidium with oxygen gas
Discuss briefly the similarities between beryllium and aluminium.
Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.
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.
Discuss the trend of the following:
Thermal stability of carbonates of Group 2 elements.
Why are BeSO4 and MgSO4 readily soluble in water while CaSO4, SrSO4 and BaSO4 are insoluble?
What is the structure of BeCl2 molecule in gaseous and solid state?
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.
Alkaline earth metals show ______.
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.
MgBr2 and Mgl2 are soluble in acetone because of ______.
PbCl4 exists but PbBr4 and Pbl4 do not because of ______.
