Question

Which of the following is not a property of an acid?

• A. Acids are sour in taste.
• B. Acids turn blue litmus red.
• C. Acids don't react with active metals to give hydrogen
• D. Acids show a neutralization reaction with bases.

Answer 1

The correct option is C

Acids don't react with active metals to give hydrogen

An explanation of the correct option:

The correct option is C:

1. We know that the general acids react with active metals and produce salt and hydrogen gas.
2. For example- Hydrochloric acid $\left(\mathrm{HCl}\right)$ reacts with Magnesium $\left(\mathrm{Mg}\right)$ and produces Magnesium chloride $\left({\mathrm{MgCl}}_2\right)$ and hydrogen gas $\left({\mathrm{H}}_2\right)$:

$\underset{\left(\mathrm{Hydrochloric}\right)}{2\mathrm{HCl}}\left(\mathrm{aq}\right)+\underset{\left(\mathrm{Magnessium}\right)}{\mathrm{Mg}\left(\mathrm{s}\right)}\to \underset{\left(\mathrm{Magnessium}\mathrm{chloride}\right)}{{\mathrm{MgCl}}_2\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Hydrogen}\mathrm{gas}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$

An explanation for incorrect options:

1. Options A: The taste of acid is sour because more Hydrogen ions are present in the acid.
2. Option B: It is the property of the acid that it turns the blue litmus to the red.
3. Option D: Acid and base react with each other and neutralize each other while producing salt and water. For example- Hydrochloric acid $\left(\mathrm{HCl}\right)$ and Sodium hydroxide $\left(\mathrm{NaOH}\right)$ react with each other and produce Sodium Chloride $\left(\mathrm{NaCl}\right)$ and water $\left({\mathrm{H}}_2\mathrm{O}\right)$:

$\underset{\left(\mathrm{Hydrochloric}\mathrm{acid}\right)}{\mathrm{HCl}\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Sodium}\mathrm{hydraoxide}\right)}{\mathrm{NaOH}\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Sodium}\mathrm{Chloride}\right)}{\mathrm{NaCl}\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Water}\right)}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Final Answer: Acids don't react with active metals to give hydrogen is not a property of the metal.