Which storage method helps minimize contact with air and moisture for reactive metals?

Which storage method helps minimize contact with air and moisture for reactive metals?

• A. Store under mineral oil
• B. Store in water
• C. Store in open air
• D. Store in humid environment

Answer: (A)

Reactive metals corrode when they contact air and moisture, so the storage method that best minimizes exposure uses a barrier that excludes water and oxygen. Mineral oil acts as that barrier by coating the metal and preventing contact with air and water vapor, keeping the surface dry and inert. Storing in water introduces moisture and can cause rapid corrosion or hydrolysis. Storing in open air or in a humid environment lets oxygen and water reach the metal, accelerating oxidation. Therefore, storing under mineral oil provides the protective barrier needed for reactive metals.

Reactive metals corrode when they contact air and moisture, so the storage method that best minimizes exposure uses a barrier that excludes water and oxygen. Mineral oil acts as that barrier by coating the metal and preventing contact with air and water vapor, keeping the surface dry and inert. Storing in water introduces moisture and can cause rapid corrosion or hydrolysis. Storing in open air or in a humid environment lets oxygen and water reach the metal, accelerating oxidation. Therefore, storing under mineral oil provides the protective barrier needed for reactive metals.