JEE MAIN - Chemistry (2021 - 26th February Evening Shift - No. 5)
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : In TlI3, isomorphous to CsI3, the metal is present in +1 oxidation state.
Reason R : Tl metal has fourteen f electrons in its electronic configuration.
In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion A : In TlI3, isomorphous to CsI3, the metal is present in +1 oxidation state.
Reason R : Tl metal has fourteen f electrons in its electronic configuration.
In the light of the above statements, choose the most appropriate answer from the options given below :
A is correct but R is not correct
A is not correct but R is correct
Both A and R are correct but R is NOT the correct explanation of A
Both A and R are correct and R is the correct explanation of A
Explanation
A : Due to inert pair effect, Tl is more stable in
+1 oxidation state
Hence TlI3 and CSI3 are isomorphous
R : Electronic configuration of Tl (81) = [Xe] 4f14 5d10 6s2 6p1
Both A and R are correct but R is not the correct explanation of A.
Hence TlI3 and CSI3 are isomorphous
R : Electronic configuration of Tl (81) = [Xe] 4f14 5d10 6s2 6p1
Both A and R are correct but R is not the correct explanation of A.
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