1.

When a small amount of HCl is added to an aqueous solution of BiCl_(3), a white precipitate is formed. This is due to

Answer»

`Bi(OH)_(3)`
`Bi_2O_3`
`BiOCl`
none of the above

Solution :`BiCl_3`, being the salt of a strong acid and weak base, undergoes partial hydrolysis under WEAKLY acidic conditions to give a WHITE precipitate of BIOCI, which dissolves in the EXCESS of the acid.
`BiOCI_(3)+3HOH to underset("ppt".)(BiOCl)+2HCl`
`BiOCl+2HCl to BiCl_(3)+H_(2)O`
BiOCl is used as a white pigment under the NAME pearl white.


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