Question

This species has $sp$ hybrid orbitals :

• A. $Be{F}_2$
• B. $N{H}_3$
• C. $C{H}_4$
• D. $C{H}_{2}C{H}_2$
• E. $CC{l}_4$

Answer 1

Answer: (A)

$Be{F}_2$

Be has 2 paired electrons but it needs 2 unpaired electrons to combine with unpaired electrons of two atoms of $F$. Outer orbit of $Be$ has two orbitals $s$ and $p$ so it promotes its one electron to the p orbital.With the promotion of electron, $2s$ orbital also gets promoted to the level of $2p$ orbital. Now $Be$ picks one sand one $p$ orbital and hybridises them to get two $sp$ hybridised orbitals. These two $sp$ hybridised orbitals get arranged in a linear shape.