Question

What is definition of acid and base?

Answer 1

Acid- a molecule or other species which can donate a proton or accept an electron pair in reactions.
base- the lowest part or edge of something, especially the part on which it rests or is supported.



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Answer 2

I'm in 10th standard...so we are taught the definition according to ARRHENIUS Concept

Actually in this we deal with the aqueous solution of acid and base

So According to Arrhenius...

ACID :- acid is a substance that dissociates in water to form H+ or hydrogen ions

Whereas
BASE:- base is a substance which dissociates in water to form hydroxide ion or OH- ions

Hope you understand