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Which statement is correct regarding acids?

Which statement is correct regarding acids?

Q. Which statement is correct regarding acids?

  1. Acid is a molecule which donates a proton or accepts electron pair in reactions.
  2. Acid increases the concentration of hydrogen atoms or hydronium atoms in water.
  3. Acids have a pH value of less than 7.
  4. The acid in the stomach helps in the digestion of food.

Answer: All the above

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