Assertion - CoCl3- 4NH3 gives two ions when ionised- Reason- Complex is -CoNH34-Cl3-

The correct option is C Assertion is correct but Reason is incorrectOption (C) is correct. CoCl_3 #8901;4NH_3 gives two ions when ionised. In this compl ...

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Standard XII

Chemistry

Molarity

Assertion : ...

Question

Assertion : $C o C l_{3} \cdot 4 N H_{3}$ gives two ions when ionised. Reason: Complex is $[C o (N H_{3})_{4}] C l_{3}$ .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Option (C) is correct.

$C o C l_{3} \cdot 4 N H_{3}$ gives two ions when ionised. In this complex, two chloride ions exhibit dual character satisfying both primary and secondary valencies. It will give precipitate corresponding to only one Cl- ion and the number of ions in this case is 2.

It may be formulated as $[C o (N H_{3})_{4} C l_{2}] C l$ and ionises as

$[C o (N H_{3})_{4} C l_{2}] C l ⟶ [C o (N H_{3})_{4} C l_{2}]^{+} + C l^{-}$

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Assertion :CoCl3⋅4NH3 gives two ions when ionised. Reason: Complex is [Co(NH3)4]Cl3.

Assertion : $C o C l_{3} \cdot 4 N H_{3}$ gives two ions when ionised. Reason: Complex is $[C o (N H_{3})_{4}] C l_{3}$ .