Complex A has a composition of H??O?Cl?Cr. It has green colour. A 0.2M solution of complex when treated with excess of AgNO? gave 57.45gm of white precipitate. The formula of the complex would be: [Given: at mass Cr = 52amu, Cl = 35.5amu, Ag = 107.8amu ]

Option 1 - [Cr(H₂O)₆]Cl₃

Option 2 - [CrCl(H₂O)₅]Cl₂·H₂O

Option 3 - [CrCl₂(H₂O)₄]Cl·2H₂O

Option 4 - [Cr(H₂O)₃Cl₃]

5 Views|Posted 5 months ago

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Raj Pandey | Contributor-Level 9

5 months ago

Correct Option - 2

Detailed Solution:

0.2 mole gives $\to 0.4$ mole of $A g C l$ (moles of $A g C l = \frac{57.45}{143} = 0.4$ $\frac{}{}$ )

1 mole complex gives $\to \frac{0.4}{0.2} = 2$ $\frac{}{}$ moles $A g C l$

The correct answer should be $2^{nd}$ $^{}$ option.

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Chemistry Coordination Compounds 2025

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