The number of ionic,covalent,and coordinate bonds in $NH_4Cl$ are respectively:

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 is the incorrect order of $X-P-X$ bond angle?

Which of the following compounds $CANNOT$ act as a Lewis base?

Give reasons for the following:
$A$. Covalent bonds are directional bonds while ionic bonds are non-directional.
$B$. Water molecule has bent structure whereas carbon dioxide molecule is linear.
$C$. Ethyne molecule is linear.

The number of different types of bonds present in $P_4O_{10}$ is: