Silica gel packets are placed in boxes of machines shipped by sea. They help prevent rust by
Acontrolling moisture
Badding more oxygen
Cadding more salt
Dmaking iron softer
Answer & Solution
Correct answer: A. controlling moisture
Silica gel absorbs moisture, and without moisture iron cannot rust easily.
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