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Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R.
Assertion (A) : In $T l I_{3}$ isomorphous to Csl_3,the metal is present in +1 oxidation state.
Reason (R) : $T l$ metal has Thirteen f - electrons is its electronic configuration.
In the light of the above statements, choose the most appropriate answer from the options given below.

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Assertion is not correct but reason is correct.

Both Assertion and reason are correct but reason is not the correct explanation of assertion.

Assertion is correct but reason is not correct.

Both assertion and reason are correct and reason is the correct explanation of assertion.

answer is A.

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Detailed Solution

${TIl}_{3} \Rightarrow {Tl}^{+} and I_{3}^{-}; {Csl}_{3} \Rightarrow {Cs}^{+} and I_{3}^{-}$
Both have same crystalline structures.
So TlI₃ and Csl₃ are isomorphous.
Electronic configuration of $Tl = Xe 4 f^{14} 5 d^{10} 6 s^{2} 6 p^{1}$

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