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Group 14 or carbon family

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By Expert Faculty of Sri Chaitanya
Question

How many of the following are Lewis acids

CCl4,SiCl4,NH3,BCl3,AlCl3,CH4

Moderate
Solution

BCl3,AlCl3 and SiCl4 are Lewis acids in BCl3,AlCl3central atoms B,Al have vacant p-orbitals and Incomplete octet thus they behave as Lewis acids SiCl4can accept lone pair of electron in d-orbitals of silicon Hence it can acts as Lewis acid.


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