Question

Why ether is polar aprotic solvent? although carbon is attached to an electronegative element

Answer 1

Well, there are no `"protic hydrogens..."`

Explanation:

And a `"protic hydrogens"` is one that can exchange hydrogens in the bulk solvent. Water, and `HF` are PROTIC solvents....ammonia is another protic solvent....tho here the regime is MUCH more basic. For ethyl and methyl ether, `Et_2O` and `Me_2O`, there is some polarity offered by the difference in electronegativity of the `C-O` bonds...however the ethers DO NOT exchange hydrogens between themselves.

Diethyl ether is a `"polar, aprotic solvent"` as advertized...