First slide
13th group or boron group

Which of the following statement (S) is/are correct

I) Both B and Al forms anionic hydrides
II) Both forms Alkaline hydroxides of formula MOH3 
III) Both Boran and Al forms a series of polymeric Hydrides
IV)Both forms monomeric halides MX3


1) AlCl3 undergoes dimerization but not BCl3

2) B(OH)3 is acidic but Al(OH)3 amphoterics 

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