When 1 mole of $C r C l_{3} .6 H_{2} O$ is treated with excess of $A g N O_{3},$ 3 moles of AgCl are obtained. The formula of the complex is
(a) $[C r C l_{3} (H_{2} O)_{3}] 3 H_{2} O$
(b) $[C r C l_{3} (H_{2} O)_{4}] C l_{2} .2 H_{2} O$
(c) $[C r C l_{3} (H_{2} O)_{5}] C l_{2} . H_{2} O$
(d) $[C r (H_{2} O)_{6}] C l_{3}$

Q. Which isomer of

C r C l_{3} .6 H_{2} O

is dark green in colour and forms one mole of

A g C l

with excess of

A g N O_{3}

solution -

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A six coordinate complex of formula CrCl3.6H2O has green colour. A 0.1 M solution of the complex when treated with excess of AgNO3 gave 28.7 g of white precipitate. The formula of the complex would be___________.

The correct option is A [Cr(H2O)5Cl]Cl2.H2OSince 0.1M complex gives 0.2 mole Agcl means 2Cl− are ionisable or out of coordination sphere so, complex is [Cr(H2O)5Cl]Cl2.H2O

A six coordinate complex of formula $C r C l_{3} . 6 H_{2} O$ has green colour. A $0.1 M$ solution of the complex when treated with excess of $A g N O_{3}$ gave $28.7 g$ of white precipitate. The formula of the complex would be___________.

The correct option is A $[C r (H_{2} O)_{5} C l] C l_{2} . H_{2} O$
Since $0.1 M$ complex gives $0.2$ mole $A g c l$ means $2 C l^{-}$ are ionisable or out of coordination sphere so, complex is $[C r (H_{2} O)_{5} C l] C l_{2} . H_{2} O$