In: Chemistry
1. the electronegativity order is Se>As>Ge. so the most polar bond is Se-Ge and the other answers have been marked in the question itself and could be explained from the electronegativity order explained.
2. electronegativity order is Br>As>Ge. so in Ge-As, Ge as
the
charge while As has
charge. In
Ge-Br, Ge has the
charge while Br has
charge. In
Br-As, As has the
charge while Br has
charge. From
this it can be concluded that the most polar bond is Ge-Br.
3. order of electronegativity for the given elements is
O>Se>Te. so in Te-O, O has charge while
Te has
charge. In Te-Se, Te has
charge while Se has
charge. In
O-Se, O has
charge while
Se has
charge. So the most polar bond among the given compounds is
Te-O.