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प्रश्न
Discuss briefly the similarities between beryllium and aluminium.
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उत्तर
Diagonal relationship: As observed in alkali metals, beryllium shows a diagonal relationship with aluminium.
Similarities between beryllium and aluminium:
- Beryllium and aluminium have the same electronegativity values.
- Their changes per unit area are closed.
- BeCl2 and AlCl3 forms dimeric structure. Both are soluble in organic solvents and are strong Lewis acids.
- Be(OH)2 and Al(OH)3 dissolves in excess alkali to give beryllate ion [Be(OH)4]2– and aluminate ion [Al(OH)4]–, respectively.
- Be and Al ions have a strong tendency to form complexes, e.g. BeF42– and AlF63–
- Both Be(OFI)2 and Al(OH)3 are amphoteric in nature.
- Carbide of Be – beryllium carbide (Be2C) and Al – aluminium carbide (Al4C3) give methane on hydrolysis.
- Both beryllium and aluminium are rendered passive by nitric acid.
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 of the following has the highest hydration energy
Beryllium halides are covalent whereas magnesium halides are ionic why?
Explain the important common features of Group 2 elements.
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
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 ______.
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.
