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Question

Which of the following is the most likely structure of CrCl36H2O, if 1/3 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution:

A
CrCl36H2O
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B
[Cr(H2O)3Cl3](H2O)3
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C
[CrCl2(H2O)4]Cl2H2O
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D
[CrCl(H2O)5]Cl2H2O
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Solution

The correct option is C [CrCl2(H2O)4]Cl2H2O
According to the question, in CrCl36H2O,1/3 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution.
Total number of Cl in compound is 3. Hence precipitated Cl = 1
Structure of compound is [CrCl2(H2O)4]Cl2H2O
Cr Cl2 (H2O)4] Cl.2H2OAgNO3−−−[CrCl2(H2O)4]++AgCl
Therefore, the correct option is (c).

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