The type of bonding in $HCl$ molecule is

Which of the following molecules follows the octet rule?

Which one of the following has the longest covalent bond distance?

Write the Lewis representation of the following molecules / ions:
$(i) H_2$
$(ii) O_2$
$(iii) O_3$
$(iv) NF_3$
$(v) CO_3^{2-}$
$(vi) HNO_3$

On decreasing the internuclear distance below the optimum distance (where potential energy is minimum),there is a steep increase in potential energy due to:

In which of the following is the maximum covalent character found between non-metallic elements?