E waybill for nil rated

is e waybill is mandatory for hsn no- 0711 which nil rated goods?
if no e-way bill requirements for exempted goods than my question is I m sending goods 100 qty
which is 80 qty is taxable goods & 20 qty is exempted,
exempted goods I m sending through bill of supply

so is it compalsary e waybill for 20qty which is sending in same vehicle