A, B and C are three complexes of chromium (III) with the empirical formula H_(12)O_(6)Cl_(3)Cr. All the three complexes have water and chlorie ions as ligands. Complex A does not react with conc. H_(2)SO_(4) whereas complexes B and C lose 6.75% and 13.5% of their original weight respectively, on treatment with concentrated H_(2)SO_(4). The complex A is

A, B and C are three complexes of chromium (III) with the empirical fo

1.	A, B and C are three complexes of chromium (III) with the empirical formula H_(12)O_(6)Cl_(3)Cr. All the three complexes have water and chlorie ions as ligands. Complex A does not react with conc. H_(2)SO_(4) whereas complexes B and C lose 6.75% and 13.5% of their original weight respectively, on treatment with concentrated H_(2)SO_(4). The complex A is
Answer» `[Cr(H_(2)O)_(4)(H)_(4)(O)_(2)]Cl_(3)` `[Cr(H_(2)O_(5))_(5)(H)_(2)(O)]Cl_(3)` `[Cr(H_(2)O)_(6)]Cl_(3)` `[Cr(H_(2)O)_(5)Cl]Cl_(2).H_(2)O` SOLUTION :As A does not react with conc. `H_(2)SO_(4)`, no `H_(2)O` is present as water of HYDRATION. HENCE, the formula is `[Cr(H_(2)O)_(6)]Cl_(3)`