What is the type of hybridization in $ClO_2^-$?

$sp^3d^2$ hybrid orbitals result in which geometry?

In $SO_2$,$NO_2^-$ and $N_3^-$ the hybridizations at the central atom are respectively $:$

Identify the molecules which have $sp$-hybridised carbon$(s)$ from the list given below:
$I$. Ethane nitrile $(CH_3CN)$
$II$. Buta$-1,3-$diene $(CH_2=CH-CH=CH_2)$
$III$. Propan$-1,2-$diene $(CH_2=C=CH_2)$
$IV$. Ethyne $(HC \equiv CH)$
$V$. Benzene $(C_6H_6)$

Describe the shapes of $BF_3$ and $BH_4^-$. Assign the hybridisation of boron in these species.

Which of the following molecules has a central atom that adopts $sp^2$ hybridization?