No, they have a bitter tang. But not salty.
Grapefruits usually have twelve segments.
yes grapefruits come from trees.
All grapefruits (red or white) have seeds unless they are sold as seedless grapefruits. Even seedless grapefruits will usually still have some small pits in them.
no, are you high?
No.
3-3.3
Grapefruits and lemons are both citrus fruits.
No
yes, grapefruits are considered acidic because they are part of the citrus group which contains citric acid so yes
vitamin c
batteries, lemons, grapefruits (ect.)
you can fart on them