The angular shape of the ozone molecule consists of

Which of the following is not used as a Lewis acid?

Which of the following is not a Lewis acid?

Select true or false statements :
$(a)$ Promotion of electron is essential condition prior to hybridisation
$(b)$ In $VSEPR$ theory,two or three electron pairs of a multiple bond are treated as a single super pair
$(c)$ Bond length for $CO_2$ lies between double and triple bonds
$(d)$ $Ne_2$ does not exist

Which of the following pairs are isoelectronic and isostructural?
$NO_3^{-}, CO_3^{2-}, ClO_3^{-}, SO_3, NO_2^{-}$

Observe the following statements:
$i$. The dipole moment of $NH_3$ is higher than the dipole moment of $NF_3$.
$ii$. The dipole moment of chloroform $(CHCl_3)$ is zero.
$iii$. Covalent bond character in $NaCl$ is more compared to $CuCl$.