Question
Which of these statements is not true?
A.
$$N{O^ + }$$ is not 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 $$Tl\left( {{\rm{III}}} \right)$$
D.
$$LiAl{H_4}$$ is a versatile reducing agent in organic synthesis.
Answer :
$$N{O^ + }$$ is not isoelectronic with $${O_2}$$
Solution :
$$\left( {\text{A}} \right)N{O^ + } = 7 + 8 - 1 = 14\,{e^ - }.$$
$${O_2} = 16\,{e^ - }$$
i.e not iso-electronic
(B) Boron forms only covalent compounds. This is due to its extremely high ionisation energy.
(C) Compounds of $$T{l^ + }$$ are much more stable than those of $$T{l^{3 + }}.$$
(D) $$LiAl{H_4}$$ is a versatile reducing agent in organic synthesis