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Ask QuestionPosted by Noman Shaikh 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Here are some ways where we can prevent rusting :
1. Paint it - Paint the metal with any durable acrylic paint. Do not use Water-Soluable paints, since they will only worsen the rust. Rust will form underneath this type of paint.
2. Keep moisture at Bay - Avoid contact with water or moisture. We know that the water has chemical formula which corresponds to 2 parts Hydrogen and 1 part Oxygen. Hence oxygen is responsible for oxidation of iron and therefore forms rust.
3. Coat it with Oil - Use of oil or grease significantly reduces the chances of developing rust in iron. Basically, oil or grease form a protective layer over iron just as paint does and therefore prevent rust formation.
Akshiii ?? 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Soundarya More 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Priyal Raj 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
2Na + 2H2O → 2NaOH + H2↑
Sodium reacts violently with cold water to form sodium hydroxide solution along with the evolution of hydrogen gas.
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Yogita Ingle 4 years, 11 months ago
The exposure of iron (or an alloy of iron) to oxygen in the presence of moisture leads to the formation of rust. This reaction is not instantaneous, it generally proceeds over a considerably large time frame. The oxygen atoms bond with iron atoms, resulting in the formation of iron oxides. This weakens the bonds between the iron atoms in the object/structure.
The reaction of the rusting of iron involves an increase in the oxidation state of iron, accompanied by a loss of electrons. Rust is mostly made up of two different oxides of iron that vary in the oxidation state of the iron atom. These oxides are:
- Iron(II) oxide or ferrous oxide. The oxidation state of iron in this compound is +2 and its chemical formula is FeO.
- Iron(III) oxide or ferric oxide, where the iron atom exhibits an oxidation state of +3. The chemical formula of this compound is Fe2O3.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Some of the physical properties of metals are listed below.
- Shiny (lustrous) in nature
- Metal is a good conductor of electricity and heat
- Density and melting point is high
- Mouldable (Malleable)
- Ductile
- At room temperature, it is in solid form except for mercury
- Opaque
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
A copper bowl loses its lusture because copper is very reactive metal and it reacts with atmospheric oxygen to form copper oxide.
2Cu+O2 --> 2CuO
This cover oxide is impervious and thick which is not lustrous. And copper oxide prevents the metal from rusting and corroding further.
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Rhea Sharma 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
Aluminium is the most commonly used and commercially available metal. Its alloys generally that have excellent corrosion resistance, good workability (machinability) and good to excellent weldability, are often used in marine applications (marine grade aluminum).
That is why it is used in building
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Zinc is coated on iron this process is called galvanisation this is done to avoid rusting of iron/ to save iron from being corroded .
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Yogita Ingle 4 years, 11 months ago
1.Copper is a good conductor of electricity.
2. It is highly ductile.
3. It is readily available due to this it is not much expensive.
This is the reason why the electric wires are made of copper
Posted by Noman Shaikh 4 years, 11 months ago
- 3 answers
Rhea Sharma 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Posted by Noman Shaikh 4 years, 11 months ago
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Posted by Noman Shaikh 4 years, 11 months ago
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Posted by Noman Shaikh 4 years, 11 months ago
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Posted by Noman Shaikh 4 years, 11 months ago
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Anusha Jain 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Meghna Thapar 4 years, 10 months ago
Manganese is the mineral used to harden steel during manufacturing. It not only increases the hardening ability and the tensile strength but also decreases the critical cooling rate in the hardening process. This makes it the most efficient alloying element among all. The term hardened steel is often used for a medium or high carbon steel that has been given heat treatment and then quenching followed by tempering.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Keratin is the non metal, which is present in hair, wool and eggs
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Yogita Ingle 4 years, 11 months ago
Due to the eight percent of the earth's crust being aluminium, it is one of the most abundant metals on earth.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Gold, Silver and Platinum are the metals that occur in their true native form in large quantities around the world.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Diamond and Graphite has more melting and boiling points. Because they are the substances with giant covalent structures have very high melting points, because a lot of strong covalent bonds must be broken.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
According to me, quartz crystals are used in watches to keep time because these type of clocks are used as electronic occilators
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
one the tip of matchstick the chemical which is used is potassium chlorate but on striking surface we use Red Phosphorus
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Yogita Ingle 4 years, 11 months ago
Two major non-metals which are present in fertilisers and enhance the growth of plants are: .
(i) Nitrogen (ii) Phosphorus
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Two major non-metals which are present in fertilisers and enhance the growth of plants are: .
(i) Nitrogen (ii) Phosphorus
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
The nonmetal used to treat rubber in the process of vulcanization is sulphur. Natural rubber is soft, sticky and has less tensile strength. Vulcanization makes rubber more strong, tough and elastic. Natural rubber is mixed with 3 to 5 % sulphur and heated at 100 to 150 deg C, which results in cross linking of chains of cis-1,4-polyisoprene through disulphide (−S−S−) bonds.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
True, Steel, alloy of iron and carbon in which the carbon content ranges up to 2 percent (with a higher carbon content, the material is defined as cast iron).
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Brass is not a metal element, but it is an alloy made of copper and zinc the proportions of zinc and copper can be varied to create a range of brasses with varying properties.
Posted by Noman Shaikh 4 years, 11 months ago
- 1 answers
Yogita Ingle 4 years, 11 months ago
Wrong, Noble gases are the least reactive of all known elements.
Posted by Noman Shaikh 4 years, 11 months ago
- 2 answers
Rhea Sharma 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
Right,
When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is:
metal + oxygen → metal oxide. Rust is a form of iron oxide and it forms slowly when iron is exposed to air.
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Ankush Bansal 4 years, 11 months ago
0Thank You