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Question

Chemistry Question on p -Block Elements

The relative strengths of trichlorides of boron group to accept a pair of electron is given by

A

GaCl3<AlCl3<BCl3GaCl_3 < AlCl_3 < BCl_3

B

AlCl3<BCl3<GaCl3AlCl_3 < BCl_3 < GaCl_3

C

AlCl3<GaCl3<BCl3AlCl_3 < GaCl_3 < BCl_3

D

BCl3<AlCl3<GaCl3BCl_3 < AlCl_3 < GaCl_3

Answer

GaCl3<AlCl3<BCl3GaCl_3 < AlCl_3 < BCl_3

Explanation

Solution

Lewis acidic strength is in the order

GaX3<AlX3<BX3Ga X_{3}< Al X_{3}< B X_{3}

So, acidic strength of trichlorides is as follows:

GaCl3<AlCl3<BCl3GaCl _{3}< AlCl _{3}< BCl _{3}

Hence, strength of accepting electron is as follows:

GaCl3>AlCl3>BCl3GaCl _{3}> AlCl _{3}> BCl _{3}