The name of $K_2CS_3$ is potassium ............... .

Determine the number of $\sigma$ bonds in $P_4O_{10}$.

Select the $CORRECT$ statement.

Which of the following statements is incorrect?
$(i)$ $NaCl$,being an ionic compound,is a good conductor of electricity in the solid state.
$(ii)$ In canonical structures,there is no difference in the arrangement of atoms.
$(iii)$ Hybrid orbitals form stronger bonds than pure orbitals.
$(iv)$ $VSEPR$ theory can explain the square planar geometry of $XeF_4$.

Which of the following have $X-O-X$ linkage? (where $X$ is the central atom):
$(i) \ Cr_2O_7^{2-}$
$(ii) \ S_2O_3^{2-}$
$(iii) \ \text{Pyrosilicate}$
$(iv) \ \text{Hyponitrous acid}$

The correct order of bond angle in the given species is: