Question

Which of the following is an example of acid?

• A. Dry HCI
• B. Aqueous HCl
• C. \(NaOH\)
• D. \(NH_4OH\)

Answer 1

The Correct Option is B

Dry HCl gas is not acidic because it does not ionize in the absence of water. An acid is defined as a substance that produces \( H^+ \) ions in aqueous solution. When HCl is dissolved in water (aqueous HCl), it ionizes completely to produce \( H^+ \) ions: \[ \text{HCl}_{(aq)} \rightarrow H^+ + Cl^- \] Therefore, aqueous HCl is acidic. NaOH and NH₄OH are bases.

NaOH and NH₄OH are bases.The correct option is (B): Aqueous HCl