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Prevention of Corrosion

What is rust?...

Question

What is rust? What is its action on pH paper? [3 MARKS]

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Solution

Rust : 2 Marks
Action on pH paper : 1 Mark

Rust chemically is iron oxide which is formed when iron is exposed to moist atmosphere in the presence of Oxygen. The formed rust weakens the metal and is seen as an undesirable change in the metal.

Suspension of rust turns red litmus blue indicating basic nature of rust.

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