The electronegativity of aluminium is similar to
carbon
boron
beryllium
lithium
E. N. of $Al =(1.5) \approx \operatorname{Be}(1.5)$
Both Al and Be has diagonal relation to each other.
The liquefied metal which expands on solidification is
$BCl_3$, exists as monomer whereas $AlCl_3$ is dimerized through halogen bridging. Give reason. Explain the structure of the dimer of $AlCl_3$ also.
Covalent electron deficient hydride is formed by
Purification of aluminium done by electrolytic refining is known as
When $BCl_3$, is treated with water, it hydrolyses and forms $[B(OH)_4]^-$ only whereas $AlCl_3$ in acidified aqueous solution forms $[Al(H_2O)_6]^{3+}$ ion. Explain what is the hybridizations of boron and aluminum in these species?
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