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

A Only I

B Both II and IV

C I, III and IV

D All the above

Answer & Explanation
Answer: All the above

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