Explain why the following compounds behave as Lewis acids ?

$(A)$ $BCl_3$ $(B)$ $AlCl_3$ 

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$BCl _3$ and $AlCl _3$ being electron deficient due to incomplete octet of central metal atom behave as Lewis acids.

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Conc. $HN{O_3}$

Given below are two statements :

Statement $I$ : Gallium is used in the manufacturing of thermometers.

Statement $II$ : A thermometer containing gallium is useful for measuring the freezing point ( $256 \mathrm{~K}$ ) of brine solution.

In the light of the above statement, choose the correct answer from the options given below :

  • [JEE MAIN 2024]

Correct Lewis acidity order of $BX_3$ is

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?

Aluminium trifluoride is insoluble in anhydrous $HF$ but dissolves on addition of $NaF$. Aluminium trifluoride precipitates out of the resulting solution when gaseous $BF $$_{3}$ is bubbled through. Give reasons.