Single Choice

Aluminium (III) Chloride forms a dimer because

Ahigher coordination number can be achieved by aluminium
Correct Answer
Baluminium has high ionisation energy
Caluminium belongs to III group
Dit cannot form a trimer

Solution

$$AlCl_3$$ can form dimer and exists as $$Al_2Cl_6$$, aluminium has vacant $$d$$-orbitals which can accommodate electron from chlorine atom. $$AlCl_3$$ is an electron deficient compound in $$Al$$ (octet incomplete) thus behaves as Lewis acid and $$Al$$ completes it by taking electron pair from $$Cl$$-atom as shown in figure.

SIMILAR QUESTIONS

p - block Elements

Thallous chloride is more stable than Thallic chloride because of

p - block Elements

Anhydrous $$AlCl_{3}$$ is covalent but hydrated $$AlCl_{3}.6H_{2}O$$ is ionic because:

p - block Elements

Which of the following is not an ionic trihalide?

p - block Elements

How can you explain higher stability of BCl3 as compared to TlCl3?

p - block Elements

What are electron deficient compounds ? Are BCl3 and SiCl4 electron deficient species? Explain.

p - block Elements

Aluminium trifluoride is insoluble in anhydrous HF but dissolves on addition of NaF. Aluminium trifluoride precipitates out of the resulting solution when gaseous BF3 is bubbled through. Give reasons.

p - block Elements

BF3 is used as a catalyst in various organic reactions because ?

p - block Elements

Back bonding in $${ BF } _{ 3 }$$ does not affect :

p - block Elements

Which of the following statements about anhydrous aluminium chloride is correct?

p - block Elements

Which is true for an element present in group 13 of the periodic table?

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