Question

Which of the following statements is true:-

• A. Silicon exhibits 4 coordination number in its compounds
• B. Bond energy of $F_2$ is less than $Cl_2$
• C. Mn(lll) oxidation state is more stable than Mn(ll) in aqueous state
• D. Elements of $15^{th}$ group shows only +3 and +5 oxidation states

Answer 1

Answer: (B)

Bond energy of $F_2$ is less than $Cl_2$

Answer 2

Bond energy of $F_2$ is less than $CI_2$ because in $F_2$
molecule electron-electron repulsion of 2p-orbital of
two fluorine atom is maximum in comparison to the
repulsion of 3p-orbitals of two chlorine atom. So,
less amount of energy is required to break the bond
of $F_2$ in comparison to $Cl_2$.