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Posted by Hum- 1151 Arti Chimankar 5 years, 3 months ago (9761401)
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Posted by Rachana Prem 5 years, 3 months ago (7345422)
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Aziz Fatima 5 years, 3 months ago (9792984)
Yogita Ingle 5 years, 3 months ago (2577571)
A person is identified as belonging to a particular nation by his cultural traditions and the language that he speaks. The language as well as the traditional practices usually develop and get established over a long period of many hundreds of years.
They give an identity to ah individual wherever he is. For instance, a Frenchman will normally speak the French language fluently. He will also follow French traditions and customs wherever he is in the world, as he would have imbibed them in his family from his childhood days. Thus, he will be identified as a French national.
Posted by Parth Pawar 5 years, 3 months ago (8087869)
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Gauarav Raj 5 years, 3 months ago (9867070)
Priyanshu Dubey 5 years, 3 months ago (9258756)
Posted by Ias Gurvi 5 years, 3 months ago (9845758)
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Posted by Neera Agarwal 5 years, 3 months ago (8424745)
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Yogita Ingle 5 years, 3 months ago (2577571)
To demonstrate it we will place a potted plant in a box in which light. comes from only one direction. in a few days, we will observe that the shoot has moved towards the side from which light came in the box.
Siddhi Khanijo 5 years, 3 months ago (8350282)
Posted by Deepak Kumar Thakur 5 years, 3 months ago (9714472)
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Posted by Satish Kumar 5 years, 3 months ago (8460374)
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Priyanshu Dubey 5 years, 3 months ago (9258756)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Yogita Ingle 5 years, 3 months ago (2577571)
USES OF DIOXYGEN
- Dioxygen is extremely vital for processes like combustion and respiration.
- Dioxygen is mixed with carbon dioxide or helium to be used for artificial respiration.
- It is used in the manufacture of many metals.
- It is highly used in oxy-acetylene welding and metal cutting.
- Dioxygen is used to oxidise ammonia in the manufacture of nitric acid.
- It is used in oxygen cylinders, which are widely used in hospitals, high-altitude flying and in mountaineering.
- Liquid oxygen is an important constituent of the fuel used in rockets.
Posted by A Bhatnagar 5 years, 3 months ago (8528696)
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Sakshi Jagtap 5 years, 3 months ago (8544477)
Sakshi Jagtap 5 years, 3 months ago (8544477)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
O is the symbol of oxygen which has a valency of -2.
Each oxygen combines with the other to complete its octet.
Now, if one atom of O conbines with the other.they both need 2 electrons each to be stable.
Thus covalent bond are formed between the two atoms,and a diatomic molecule is formed.
This molecule is reffered to as di - oxygen.
Posted by Birendra Singh Chaprana 5 years, 3 months ago (9701059)
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Gaurav Seth 5 years, 3 months ago (2898529)
Northern Hemisphere
India is located latitudinally in the Northern Hemisphere and longitudinally in the Eastern Hemisphere. It extends from 80 4' N to 370 6' N latitude and 680 7' E to 970 25' E longitude.
Posted by Nikitha Savio 5 years, 3 months ago (9890498)
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Posted by Anjali Mahadik 5 years, 3 months ago (9770441)
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Anjali Mahadik 4 years, 10 months ago (9770441)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Priyanshu Dubey 5 years, 3 months ago (9258756)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Priyanshu Dubey 5 years, 3 months ago (9258756)
Posted by Ayush Vishwakarma?? 5 years, 3 months ago (3747171)
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Neha Neha 5 years, 3 months ago (9756292)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
Sulphuric acid is called the King of Chemicals because it is used in the preparation of a very large number of other useful chemicals such as hydrochloric acid, nitric acid, dyes, drugs etc. In fact the annual production of shulpuric acid in a country is a measure of the economy of the country.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
Oxoacids are basically acids that contain the element oxygen. As such, Phosphorus is known to form a number of oxoacids, for example: H3PO4, H3PO3, etc. In oxoacids of phosphorus, it is tetrahedrally surrounded by other atoms. Generally, all these acids are known to form at least one P=O bond and one P–OH bond.
Posted by Neha Prajapati 5 years, 2 months ago (9890734)
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Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Posted by Ritwik Rohatgi 5 years, 3 months ago (9685706)
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Muskan Sharma 5 years, 3 months ago (9897710)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Posted by Vishakha Baisoya 5 years, 3 months ago (9890755)
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Gaurav Seth 5 years, 3 months ago (2898529)
Answer:
Sam was a psychiatrist. He got worried about Charley as he told Sam that he reached the third level. He firmly believed it did not exist. However, he himself was not only convinced but also escaped to Galesburg.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
Ozone
It is represented as O3. It is found in upper atmosphere.
Preparation:
- It is prepared when ultraviolet rays. They react with oxygen of upper atmosphere and splits oxygen molecule in oxygen atoms. Then this oxygen atom combines with oxygen molecule to form ozone:
- 3O2 ---> 2O3
- Oxygen Ozone
- The reaction is endothermic approx. 142.7kJ of heat is needed.
- For preparing pure ozone we use ozoniser, in which the electric spark is passed through oxygen gas and we get ozone.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
Dioxygen plays a vital part in the existence of life. It is a highly reactive non-metal and it is a member of the chalcogen group on the modern periodic table. Oxygen is diatomic molecule and hence two atoms of the elements combine to form dioxygen. It is the third most abundant element in the universe.
Around 21% of the earth’s atmosphere consists of this gas in its free state. Chemical formula of oxygen is O2. It is the most abundant element found in the earth’s crust.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Gaurav Seth 5 years, 3 months ago (2898529)
Dioxygen plays a vital part in the existence of life. It is a highly reactive non-metal and it is a member of the chalcogen group on the modern periodic table. Oxygen is diatomic molecule and hence two atoms of the elements combine to form dioxygen. It is the third most abundant element in the universe.
Around 21% of the earth’s atmosphere consists of this gas in its free state. Chemical formula of oxygen is O2. It is the most abundant element found in the earth’s crust.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 2 answers
Pragati Gola 5 years, 2 months ago (9129568)
Yogita Ingle 5 years, 3 months ago (2577571)
Halides are binary compounds that are of which one part is an element another part is the halogen atom. A radical is less electronegative compared to that of halogens which form astatine, bromide, fluoride and chloride. Most of the salts are halides. Various halide compounds are tested using silver nitrate solution. Some include Kl, KBr, and KCl.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 1 answers
Yogita Ingle 5 years, 3 months ago (2577571)
Acidic nature: Due to the decreasing bond dissociation enthalpy, acidic character of group 16 elements increases down the group.
H2O < H2S < H2Se < H2Te
Posted by Dgf Chd 5 years, 3 months ago (4635669)
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Yogita Ingle 5 years, 3 months ago (2577571)
- Electron Gain Enthalpy: The electron gain enthalpy decreases with increase in the size of the central atom moving down the group. Oxygen molecule has a less negative electron gain enthalpy than sulfur. This is on the grounds that Oxygen, because of its compressed nature encounter more repulsion between the electrons effectively present and the approaching electron.
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Ritik Kumar 5 years, 3 months ago (9904949)
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