Which of the following is not a Lewis acid?

What is the number of sigma $(\sigma)$ bonds in $P_4O_{10}$?

Some of the properties of the two species,$NO_{3}^{-}$ and $H_{3}O^{+}$ are described below. Which one of them is correct?

Choose the correct order for the given properties.

The oxidation state $(n)$,coordination number $(CN)$ of $Al$,and the number of valence electrons around $Al$ $(N)$ in $Al_2Cl_6$ are respectively:

For the ozone molecule,consider the following statements:
$(A)$ It is a linear molecule with a bond angle of $180^{\circ}$.
$(B)$ It is an angular molecule with a bond angle of $117^{\circ}$.
$(C)$ The bond lengths of both $O-O$ bonds are the same.
$(D)$ With respect to oxygen,it is thermodynamically more stable.
The correct options are: