No, grapes are not citrus.
In the scientific classification, grapes are in the genus vitis.
But lemons, Oranges pomelos and limes etc are in the genus citrus.
If it isn't ripe, than yes. most of the time though grapefruits are sour. the only time they arent is when you dump sugar on them.
The grapefruit isn't as sour.
Citric acid
I personally like grapefruit a little bit. They are a bit sour (and sweet) but taste pretty good.
a lemon is more sour than a grapefruit because it is more acidic.
A grapefruit is a FRUIT. Think about it grapefruit, fruit, get the hint? Look it up online and you should get the grapefruit tree, and it say that it is know for it sour fruit.
I think it would be either a lemon a grapefruit (the yellow grapefruit is the most sour).
grapefruit -Other person What about lemon?
watermeloncantaloupeblackberrybing cherryclementine
it depends on how well your tongue takes in food. Lemons have more acid in them, so most of the time a persons tongue reacts as if the lemon is more sour than something like grapefruit.
Lemon has a higher concentration of Citric acid that is why it is more sour.
Kill you if you take a specific prescription drug read bottle labels!!! it can taste sour, sweet, etc
there's... ~ lemons ~ limes ~ anythink pickled e.g. pickled onions/gherkins ~ vinegar (not food though) ~ toxic waste sweets (or candy or whatever Americans call them) ~ and many more but i cant think of any at the moment x