Advertisements
Advertisements
प्रश्न
Discuss briefly the similarities between beryllium and aluminium.
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
Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
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.
Write a balanced chemical equation for the following chemical reaction.
Rubidium with oxygen gas
Beryllium halides are covalent whereas magnesium halides are ionic why?
Alkaline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergoes metal displacement reaction with AgNO3 solution to form compound (D). Identify A, B, C and D.
When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ______.
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.
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 ______.
