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Ask QuestionPosted by Amala Ka 5 years, 9 months ago
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Posted by Juveriya Saifi.... 5 years, 9 months ago
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Posted by Isha Sheikh 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
Domain is an area of interest or an area over which a person has control
Posted by Durgesh Dewangan 5 years, 9 months ago
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Nityam Bhatt 5 years, 9 months ago
Posted by Shivansh Sahu 5 years, 9 months ago
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Shivansh Sahu 5 years, 9 months ago
Posted by Gurjot Gill 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
A substance which cannot be broken down into two or more simpler substances by chemical reactions is called an element.
For Example: Iron,hydrogen,helium,oxygen,phosphorus,sulphur,chlorine,bromine,gold,silver,mercury, aluminium etc.
Posted by Lakshay Sharma 5 years, 9 months ago
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Posted by Hitesh Choudhary 5 years, 9 months ago
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Posted by Vedika Sharma 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
| Metals |
Non-Metals |
|
1. Oxides of metal are basic in nature. |
1. Oxides of non-metals are acidic in nature. |
|
2. Metals displace hydrogen from dilute acids. |
2. They cannot do so. |
|
3. Metals form chlorides which are electrovalent or ionic compounds. |
3. Non-metals form chlorides which are covalent compounds. |
|
4. they displace hydrogen from water |
4. They cannot do so. |
Posted by Ishneet Kaur 5 years, 9 months ago
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Alisha Mariyal 5 years, 9 months ago
Vedika Sharma 5 years, 9 months ago
Posted by Buta Gill 5 years, 9 months ago
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Posted by Isha Chauhan 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
i. Typhoid and cholera are caused by bacteria.
ii. Polio, dengue and chickenpox are caused by virus.
iii. Ringworm is caused by fungi.
iv. Amobiasis is caused by Entamoeba histolytica
v. Malaria is caused by Protozoan.
Posted by Pragya Pushp 5 years, 9 months ago
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Gaurav Seth 5 years, 9 months ago
Myopia is the defect of the eye vision due to which a person can see the near by objects clearly but cannot see the far objects so distinctly.
Causes of myopia: Myopia is caused:—due to the elongation of the eyeball.—due to decrease in the focal length of the eye lens.
Myopia can be corrected by using a concave lens of suitable focal length in the spectacles of such a person.
Posted by Suhani Singh 5 years, 9 months ago
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Posted by Dhanu Dhanalakshmi 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier.
Posted by Sarthak Hole 5 years, 9 months ago
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Posted by Sumedha Sahu 5 years, 9 months ago
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Posted by Paresh Khamari 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
Iron is used in bridges and automobiles to provide strength but it tends to corrode and rust. So, a coating of zinc is deposited on iron to protect it from corrosion and formation of rust.
Posted by Paresh Khamari 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
Chromium has a shiny appearance and does not corrode. It resists scratches. So it is used for electroplating.
Posted by Paresh Khamari 5 years, 9 months ago
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Meghna Thapar 5 years, 7 months ago
Tin cans used for storing food, are made by electroplating tin onto iron. Tin is less reactive than iron. Due to electroplating, food does not come into contact with iron and is protected from getting spoilt.
Posted by Paresh Khamari 5 years, 9 months ago
- 1 answers
Meghna Thapar 5 years, 7 months ago
Electroplating is a process of coating a surface with a thin layer of metal with the help of the electrochemical process.
Applications:
i. Aesthetics
ii.Commercial applications
iii. To prevent corrosion
iv. Conduction of Electricity
v. Reduce friction
vi. To protect from radiation
Posted by Paresh Khamari 5 years, 9 months ago
- 1 answers
Meghna Thapar 5 years, 7 months ago
Electric current can bring about chemical changes, so it is said to have a chemical effect. When electric current is passed through acidified water by using carbon electrodes, then a chemical reaction takes place to form hydrogen gas and oxygen gas. In this reaction, water has been decomposed into two elements hydrogen and oxygen, by the action of electric current.
Posted by Paresh Khamari 5 years, 9 months ago
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Revathi Sivaraman 5 years, 9 months ago
Posted by Paresh Khamari 5 years, 9 months ago
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Revathi Sivaraman 5 years, 9 months ago
Posted by Paresh Khamari 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Iron is more “reactive” than copper. So it displaces Copper from Copper Sulphate solution.
Copper Solution is blue in colour. Iron Sulphate solution is Green.
Iron has blackish appearance, while Copper is reddish brown.
Reaction proceeds as
Fe + CuSO4 → FeSO4 + Cu
Due Iron Sulphate formed, the copper sulphate solution turns green and Copper deposits on Iron nails, giving them brownish colour
Posted by Paresh Khamari 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore, it can be beaten into thin foils.
A metal candisplace a less reactive metal from its salt in an aqueous solution. But zinc is more reactive than copper. Therefore, copper cannot displace zinc from its salt solution. Cu(s) + ZnSO4 (aq) → No reaction
Posted by Paresh Khamari 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
No, lemon pickle cannot be stored in aluminium utensils because lemon pickle contains acids, which can react with aluminium (metal) liberating hydrogen gas. this can lead to the spoiling of the pickle. metals reacts with acids vigorously to form metallic chlorides,which acts as a poison for human body thatswhy lemon being citric acid cant be stored in aluminium utensils.
Posted by Paresh Khamari 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
Some non-metals such as phosphorus, react with the air. It catches fire if exposed to air. So, phosphorus is stored in water.
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Ashi Shakya 5 years, 9 months ago
1Thank You