Advertisements
Advertisements
प्रश्न
Two methods by which rusting of iron can be prevented are ______ and ______.
Advertisements
उत्तर
Two methods by which rusting of iron can be prevented are painting and galvanization.
Explanation:
Painting creates a protective barrier, while galvanization involves coating iron with zinc to prevent rust.
APPEARS IN
संबंधित प्रश्न
The corrosion of copper produces a ______ coating of basic copper carbonate on its surface.
In stainless steel alloy, iron metal is mixed with ______.
Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to........................... reaction. Different
regions on iron surface become anode and cathode.
Reaction on anode region :
`F_e(s) → Fe^(2+) (aq) +2e^-`
Reaction on anode region :
`O_2(g) + 4H^+(aq) +............................ → 2H_2 O (l) `
When Fe2+ ions migrate from anode region they react with ................... to form Fe3+ ions.
A reddish coloured hydrated oxide is formed from ............... ions. It is called rust.
`2Fe_(3+) (aq) + 4H_2O(l) → ................. + 6H_+(aq) `
A way to prevent rusting ..................................................................
Give reason.
A wooden article should be polished.
When one of the metals in an alloy is mercury the alloy is called _______.
Match the columns.
| Group A | Group B |
| 1) Electroplating | a) Pressure cooker |
| 2) Anodising | b) Silver plated spoons |
| c) Coating of tin on copper | |
| d) Coating of Zinc on iron |
Observe the following diagram and give answers.
- Name this method of prevention of corrosion.
- For prevention of which metal this method is used?
- What is used as anode in this method?
The process of coating the surface of the metal with a thin layer of zinc is called ______
Galvanisation is a process used to prevent the rusting of which of the following?
Give scientific reasons.
Silver amalgam is used for filling dental cavities.
