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Smallest Cell in the Human Body
Sperm Is the Smallest cell and Nerve cells is the longest cell in Human Body Cells have several elements, every with a unique performance. A number of these elements, known as organelles, area unit specialized structures that perform sure tasks inside the cell Cells are of various shapes and sizes,Read more
Sperm Is the Smallest cell and Nerve cells is the longest cell in Human Body
Cells have several elements, every with a unique performance. A number of these elements, known as organelles, area unit specialized structures that perform sure tasks inside the cell
Cells are of various shapes and sizes, completely different shapes and sizes, because of the different functions performed by different cells. The biggest cell is the ovum of the ostrich. The longest cell is that the vegetative cell. The most important cell within the physical body is that the feminine gamete. The smallest cell within the Human body is that the male gametes, that is, sperm.
Sperm Is the Smallest cell and Nerve cells is the longest cell in Human Body
See lessWhat is kolbe reaction?
kolbe reaction is a type of phenol reaction. in which phenol is react with sodium hydroxide, phenoxide ion is generated. this is first step reaction and in second step reaction, phenoxide ion again react with CO2 and acidification (H+). then it give ortho hydroxy benzoic acid. this product is also kRead more
kolbe reaction is a type of phenol reaction. in which phenol is react with sodium hydroxide, phenoxide ion is generated. this is first step reaction and in second step reaction, phenoxide ion again react with CO2 and acidification (H+). then it give ortho hydroxy benzoic acid. this product is also know as salicylic acid.
Kolbe reaction equation
kolbe reaction is a type of addition reaction or is a type of phenolic reaction. In which phenol is taken first, in this case phenol does not have a direct reaction.
the acidic hydrogen of phenol has to be removed. acidic hydrogen can be remove with the help of naoh (sodium hydroxide). this is shown in the reaction. and reaction is,
In this reaction, acidic hydrogen of phenol will be remove by naoh. and this reaction will form sodium phenoxide. Now, sodium phenoxide react with CO2 and also does acidification.
When sodium phenoxide react with CO2. and acidification (H+) after this reaction, hydroxyl group (COOH) comes to ortho position. this is called kolbe reaction.
Why sodium phenoxide react with CO2 then COOH comes to ortho position?
Resion is, intermolecular hydrogen bonding occur between oxygen and hydrogen. that’s why hydroxyl group attached on ortho position.
this product is know as ortho hydroxyl benzoic acid. it is also called salicylic acid.
See lesswhat is valency of sulphur
Concept of valency - If we are taking about what is the basic concepts of valency. the basis concepts for valency of this atom is, the electrons gained or loss by an atom to complete outmost shell. it mean, atom stability depends upon gained electrons or loss electrons for complete outmost shell.Read more
Concept of valency – If we are taking about what is the basic concepts of valency. the basis concepts for valency of this atom is, the electrons gained or loss by an atom to complete outmost shell. it mean, atom stability depends upon gained electrons or loss electrons for complete outmost shell. if the outmost shell is completed then that atom is said to be stable. and stability of an atoms is possible with gaining electrons or loosing electrons for complete outmost shell. this phenomenon is know as valency.
How to calculate valency of sulphur atom?
The valency of sulphur is determined by two methods. such as,
1. Valency of sulphur, is determine by periodic table.
You can check directly, element of group 16 because atomic waight of sulfur is 16. you got the valency of oxygen and the valency of sulphur is 6 in periodic table.
2. Valency of sulphur, is determine by electrons configuration.
You know that, sulphur atom has 6 electrons in the outmost shell. and the valency of sulphur could be 6. Sulphur required 2 electrons to complete outmost shell. so, sulphur gain 2 electrons to achieve stability and complete outermost shell. it mean, sulphur has to gain 2 electrons. As show in structure of sulfur.
Now, you can understand properly with the help of electron configuration. So, let’s write electron configuration of sulphur.
Sulfur electron configuration is,
1s2, 2s2, 2p6, 3s2, 3p4
the highest energy level in electrons configuration is, 3s2 3p4.
if add this,
We get 2 + 4 = 6.
So, the valency is 6.
Due to this reason, gained 2 electron for proper stability of sulphur or complete octet in outermost shell.
therefore, the valency of sulphur is 2.
The option c is write answer.
And if we are talking about so2 and so3 it required 6 electrons to complete the outermost shell.
therefore, the valency of this compound such as,
(S) sulphur – 2.
(so2) sulphur dioxide – 6.
(so3) sulphur trioxide – 6.
If you learn in details about, valency of sulphur, valency of so2 and valency of so3?then clik on link and read. you get more valuable information regarding sulphur atom.
See lessWhat is valence bond theory
Valence bond theory is to explain about chemical bonding and covalent bond. and valence bond theory uses for explanation the formation of covalent bond between two hydrogen atoms with the help of overlapping. the chemical bonding of two hydrogen atoms as per the valence bond theory. according to valRead more
Valence bond theory is to explain about chemical bonding and covalent bond. and valence bond theory uses for explanation the formation of covalent bond between two hydrogen atoms with the help of overlapping. the chemical bonding of two hydrogen atoms as per the valence bond theory. according to valence bond theory, a covalent bond is formed by the overlapping of two half filled atomic orbitals having electrons with opposite spins. it is based on wave nature of electrons.
Let’s know with example,
the best example is H2.
This covalent bond formation is called s – s overlapping.
See lessPhysical Education teacher job vacancy in schools?
Finding job vacancy for a Physical Education teacher is quiet a task. You can search for it online but it won't be fruitful. The best way to check for such vacancy is to visit the local schools by yourself. Contact the school office and submit your qualifications with your resume. You can contact toRead more
Finding job vacancy for a Physical Education teacher is quiet a task. You can search for it online but it won’t be fruitful. The best way to check for such vacancy is to visit the local schools by yourself. Contact the school office and submit your qualifications with your resume. You can contact to schools farther from your area via. phone call or email. Just keep trying.
See lessWhen we apply for a job for physical education teacher what message we can give to them?
At first, you need to check for such vacancy in the respective schools. If the vacancy for a Physical education techer is available, you need to contact the school office as soon as possible. Take "your job application" and the 'resume' with yourself. Also try to submit your physical fitness certifiRead more
At first, you need to check for such vacancy in the respective schools. If the vacancy for a Physical education techer is available, you need to contact the school office as soon as possible. Take “your job application” and the ‘resume’ with yourself. Also try to submit your physical fitness certificate to the office. You might be asked to provide a demo class so be prepared!
See lessIs physical fitness certificate compulsory for eamcet counselling?
Physical fitness certificate is not necessary in the councelling of AP EAMCET and TS EAMCET entrance exams. However, you might need to submit your Corona test report alongwith your vaccination certificate.
Physical fitness certificate is not necessary in the councelling of AP EAMCET and TS EAMCET entrance exams. However, you might need to submit your Corona test report alongwith your vaccination certificate.
See less