JEE Main 2021 (Online) 16th March Morning Shift | d and f Block Elements Question 38 | Chemistry

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 :

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

JEE Main 2021 (Online) 26th February Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following lanthanoids does not form MO₂? [M is lanthanoid metal]