Answer: moderately polar covalent
Explanation:
A polar covalent bond is defined as the bond which is formed when there is a difference of 0.4 to 2 in electronegativities between the atoms. It is also defined as the bond which is formed due to the unequal sharing of electrons between the atoms. An electronegative atom is the one which attracts the shared pair of electron towards itself.
Non-polar covalent bond is defined as the bond which is formed when there is less than 0.4 difference in electronegativities between the atoms.
Ionic bond is formed when there is complete transfer of electron from one atom to another atom which is formed when there is more than 2.0 difference in electronegativities between the atoms.
The given electronegativities of chlorine is 3.16 and that of seleium is 2.55, hence the difference is (3.16-2.55) = 0.61 , which is less than 1.7 and thus bond is moderately polar covalent.
