Question

Which of the following complexes produces three moles of silver chloride when its mole is treated with excess of silver nitrate ?
A. `[Cr(H_(2)O)_(3)Cl_(3)]`
B. `[Cr(H_(2)O)_(4)Cl_(2)]Cl`
C. `[Cr(H_(2)O)_(5)Cl_(2)]Cl_(2)`
D. `[Cr(H_(2)O)_(6)]Cl_(3)`

Answer 1

Correct Answer - D
(D) `[Cr(H_(2)O)_(6)]Cl_(3) overset(aq)iff[Cr(H_(2)O)_(6)]^(3+)(aq)+3Cl^(-)(aq)`,
`Cl^(-)` present in ionisation sphere will give precipitate with `AgNO_(3)`.
`3Cl^(-)+3Ag^(+) to 3AgCl`
So, one mole of complx will give three moles of AgCl precipitate.