No, sodium hydroxide (NaOH) does not turn litmus solution purple. Here's why:

* Litmus paper is a pH indicator. It changes color depending on the acidity or alkalinity of a solution.

* Sodium hydroxide is a strong base. Bases have a pH greater than 7.

* Litmus paper turns blue in the presence of a base and red in the presence of an acid.

Therefore, sodium hydroxide would turn litmus solution blue, not purple.