Answer :
★Acid
- these are sour in taste
- corrosive in nature
- the turn blue litmus to red when litmus paper is dipped into it
- we also eat acids like citric acid in our daily life
★Base
- bitter in taste
- soapy to touch
- turn red litmus to Blue
- we use bases like milk of magnesia and antacid in our daily life
Hope it helps u