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प्रश्न
State two conditions necessary for rusting of iron.
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उत्तर
- The presence of water and oxygen is essential for the rusting of iron.
- Impurities in the iron, the presence of the water vapor, acids, salts and carbon dioxide hastens rusting.
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संबंधित प्रश्न
Why do we apply paint on iron articles?
Explain why Iron sheets are coated with zinc during galvanization.
State two conditions for the rusting of iron.
Fill in the following blanks with suitable words:
Tiffin boxes are electroplated with .............. but car bumpers are electroplated with ............... to protect them from rusting.
Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken.
Four metals P, Q, R and S are all obtained by the reduction of their oxides with carbon. Metal P is used to form a thin layer over the sheets of metal S to prevent its corrosion. Metal Q is used for electroplating tiffin boxes made of metal S whereas metal R is used in making car batteries. Metals Q and R form an alloy called solder. What are metals P, Q, R and S? How have you arrived at this conclusion?
Write scientific reason.
Coins are made from metals and alloys.
Complete flow chart given below.
Amalgam is an alloy of ____________.
Copper objects lose their shine and form green coating of ____________.
