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Question

When 0.1 mol CoCl3(NH3)5 is treated with excess of AgNO3,0.2 mol of AgCl are obtained. The conductivity of solution will correspond to:

A
1:3 electrolyte
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B
1:2 electrolyte
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C
1:1 electrolyte
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D
3:1 electrolyte
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Solution

The correct option is C 1:2 electrolyte
0.2 mol of AgCl are obtained when 0.1 mol CoCl3(NH3)5 is treated with excess of AgNO3 which shows that one molecule of the complex gives two Cl ions in solution.
Thus, the formula of the complex is [Co(NH3)5Cl]Cl2 i.e. 1:2 electrolyte.

Hence, Option "B" is the correct answer.

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