Q. Which statement is correct regarding acids?
- Acid is a molecule which donates a proton or accepts electron pair in reactions.
- Acid increases the concentration of hydrogen atoms or hydronium atoms in water.
- Acids have a pH value of less than 7.
- The acid in the stomach helps in the digestion of food.
- Only I
- Both II and IV
- I, III and IV
- All the above
Answer: All the above
