Which one of the following elements does not | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Boron $(B)$ is a non-metal and does not form a stable triiodide $(BI_3)$ under standard conditions due to its small size and high ionization energ

Vedclass · Accepted Answer

$Tl$

Vedclass · Answer

(B) Boron $(B)$ is a non-metal and does not form a stable triiodide $(BI_3)$ under standard conditions due to its small size and high ionization energy, although $BI_3$ can be synthesized under specific conditions. However, in the context of group $13$ elements and the inert pair effect, $Tl$ (Thallium) is the most distinct. $Tl$ prefers the $+1$ oxidation state over the $+3$ state due to the inert pair effect, making $TlI_3$ highly unstable and it readily decomposes into $TlI$ and $I_2$. Thus, $Tl$ does not form a stable triiodide.

Which one of the following elements does not form triiodide on reacting with iodine?

Similar Questions

Aluminium reacts with caustic soda to form

Two students were given the task to prepare an adduct $NH_3 \to BH_3$ at low temperature :-
Student $I$ :- She mixed $B_2H_6$ and $NH_3$
Student $II$ :- He mixed $B_2H_6$ with $THF$ followed by addition of $NH_3$
Which student is expected to get the $CORRECT$ final product?

Which of the following substances imparts a green color to the burner flame?

Explain what happens when boric acid is heated.

The acidic strength of boron trihalides follows the order:

Vedclass Test Series

Exam Paper Generator

Online Exam Module