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Chemistry

Assertion (A): All acids form hydronium ions when dissolved in water.

Reason (R): Every acid has hydrogen as the necessary element.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Acids Bases Salts

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Answer

Both A and R are true and R is the correct explanation of A.

Explanation — When dissolved in water, acids donate protons (H⁺), which associate with water molecules to form hydronium ions (H₃O⁺).
Acids are defined as compounds which contain one or more hydrogen atoms and when dissolved in water, produce hydronium ions (H₃O⁺) as the only positively charged ions. Hence both assertion (A) and reason (B) are true and (R) correctly explains (A).

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