Question

Acids which dissociate into ions completely are called ........ acids and which don't dissociate into ions completely are called ......... acids.

• A. weak, strong
• B. strong, weak
• C. weak, very weak
• D. none of the above

Answer 1

The correct option is B strong, weak

Acids are compounds that release hydrogen ions in the solution medium and the hydrogen ions are responsible for acidity of the acids.

The strength of any acid is determined on the basis of it's dissociation power, i.e more the number of hydrogen ions per unit volume, more is the strength of the acids.

Thus, the stronger acids undergo complete dissociation and hence the number of hydrogen ions they release is more than the weaker acids that undergo only partial dissociation due to which only some amount of hydrogen ions are available.

Thus, acids which dissociate into ions completely are called strong acids and which don't dissociate into ions completely are called weak acids.

Hence, the correct answer is option (B).