Question

Which of these statements is not true?

• A. $N{O}^{+}$ is isoelectronic with $O_2$.
• B. $B$ is always covalent in its compounds.
• C. In aqueous solution, the $T{l}^{+}$ ion is much more stable than $TI\left(III\right)$.
• D. $LiAl{H}_4$ is a versatile reducing agent in organic synthesis.

Answer 1

Answer: (A)

$N{O}^{+}$ has 14 electrons and $O_2$ has 16 electrons.Therefore, they are not isoelectronic species.

Boron is covalent in its compound.

$T{l}^{+}$ is much more stable than $T{l}^{3+}$ as going down the group the stability of lower oxidation number increases due to inert pair effect.

$LiAl{H}_4$ is a selective reducing agent in organic synthesis.

Hence, option $A$ is not true.