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प्रश्न
What is the structure of BeCl2 molecule in gaseous and solid state?
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उत्तर
Beryllium chloride has different structures in solid and vapour state. In solid-state, it exists in the form of polymeric chain structure in which each Be– atom is surrounded by four chlorine atoms, having two of the chlorine atoms covalently boned while the other two by coordinate bonds. The resulting bridge structure contains infinite chains.
Structure of BeCl2 in solid-state
In vapour state, above 1200 K, it exists as a monomer having linear structure and zero dipole moment. But below 1200 K, it exists as dimer even in the vapour state.
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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?
Which one of the alkaline earth metal carbonates is thermally the most stable?
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.
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.
Beryllium halides are covalent whereas magnesium halides are ionic why?
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 ______.
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
Discuss the trend of the following:
The solubility and the nature of oxides of Group 2 elements.
Why are BeSO4 and MgSO4 readily soluble in water while CaSO4, SrSO4 and BaSO4 are insoluble?
Assertion (A): Beryllium carbonate is kept in the atmosphere of carbon dioxide.
Reason (R): Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.
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.
MgBr2 and Mgl2 are soluble in acetone because of ______.
