Question

Which one of the following is a strong base?

• A. NaOH
• B. Cu(OH)\textsubscript{2}
• C. NH\textsubscript{4}OH
• D. Mg(OH)\textsubscript{2}

Hint:

Strong bases are generally hydroxides of alkali metals like NaOH and KOH.

Answer 1

The Correct Option is A

Step 1: Definition.
Strong bases are those which completely dissociate in water.
Step 2: Explanation.
- NaOH dissociates completely, hence strong base.
- Cu(OH)\textsubscript{2}, NH\textsubscript{4}OH, Mg(OH)\textsubscript{2} are weak bases because they dissociate partially.
Step 3: Conclusion.
Thus, NaOH is the correct answer.