Final answer:
The given reaction is true. Dissolved oxygen can be removed from water using the Winkler method.
Step-by-step explanation:
The given reaction is used to remove dissolved oxygen gas from aqueous solutions. True. Dissolved oxygen can be removed from water by a chemical reaction called the Winkler method. In this method, the water sample is treated with a solution of MnSO4, NaOH, and KI. Under alkaline conditions, the dissolved oxygen oxidizes Mn2+ to MnO2, which is then titrated to determine the oxygen content.