alleryStart learning →A thin layer of grease on iron tools stored for long keeps them from rusting by
Ablocking air and water
Badding zinc to it
Cheating up the iron
Dmaking iron magnetic
Answer & Solution
Correct answer: A. blocking air and water
Grease or oil forms a film that keeps oxygen and moisture away from the metal.
Keep practising Physical and chemical changes
Browse all Physical and chemical changes questions for Olympiad (Class 7), or explore more Science topics.
Related questions
A change in colour during a process most reliably suggestsCopper turns green after long exposure to damp air. This shows copper hasWhich pair correctly matches the change with its type?Baking soda is added to vinegar and bubbles of gas appear. This showsWhich of these is a physical change?A chemical reaction changes the atoms of a substance byRusting is specifically the corrosion of which metal?Stainless steel resists rusting because it forms a thin layer of