Explain why is non-polar while is polar.
The dipole movement of both compounds decides whether they are polar or non-polar. As is a linear molecule, it is non-polar in nature because of equal distribution of its diploe movement in both directions. This makes the net dipole movement zero. But in the case of ethers, the dipole movement might be in opposite directions, but the net movement is not zero, which makes it a non-polar molecule.