Which of the following is the most likely structure of CrCl3⋅6H2O, if 1/3 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution:
A
CrCl3⋅6H2O
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B
[Cr(H2O)3Cl3](H2O)3
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C
[CrCl2(H2O)4]Cl⋅2H2O
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D
[CrCl⋅(H2O)5]Cl2⋅H2O
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Solution
The correct option is C[CrCl2(H2O)4]Cl⋅2H2O According to the question, in CrCl3⋅6H2O,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]Cl⋅2H2O CrCl2(H2O)4]Cl.2H2OAgNO3−−−−→[CrCl2(H2O)4]++AgCl
Therefore, the correct option is (c).