Chemistry

SN1 mechanism

This mechanism is seen in Nucleophillic Substitution reactions, especially in those compounds in which the Carbon atom is more substituted . The rate of this mechanism depends on the step 1 where the leaving group leave with electron pair and leaves behind a carbocation. The whole rate depends only on one molecule. That’s why it

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Why sky appears blue in colour ?

The particles of atmosphere which are of colloidal size can easily scatter the blue component of the light. The wavelength of blue light allows its scattering easily. That’s why it appears blue in colour. Why sky appears blue in colour ?

What is an SN2 mechanism? What is its importance?

This is a type of reaction mechanism that is seen in case of nucleophillic substitution reactions. It is BIMOLECULAR NUCLEOPHILLIC SUBSTITUTION mechanism. In this kind of mechanism two molecules decide the rate of reaction, so it is BIMOLECULAR mechanism. The whole mechanism proceeds through a single step. That concerted step involves the bond breaking and

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Why Bond angle in PH4+ is higher than in PH3 ?

In case of both molecules the hybridization of P is sp³ but there is a difference. In case of PH3 we have a lone pair present on the phosphorus atom. This lone pair pushes the bond pairs downwards due to lone pair-bond pair repulsions which decreases the bond angle in P-H-P atoms, as shown below.

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What are fuel cells?

This is a very new concept in the field of energy . The conventional energy generators were having a maximum efficiency of approximately 52%. Which is very low . Most of the energy in that system was dissipated in the form of heat lost to the surroundings and in overcoming the frictional forces of the

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What dissolves faster in water, salt or sugar?

For this we have to understand that the nature of water is polar. And salt is an ionic compound which is also polar in nature. But sugar is non polar in nature and thus it have a different nature. The dissolution of substances follow a simple rule ,”Like dissolves like.” So salt will dissolve faster

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Why is chlorine electron withdrawing?

Chlorine being the 2nd member of group 17 elements also known as the halogens have a strong electron affinity. And due to its high electronegativity and electron gain enthalpy ,it shows electron withdrawing nature. We can refer to the following post to get in depth knowledge of the concept. Why the electron affinity or electron

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An Unknown Statement

Leave me, I do not mean at all. I wish you look at the expressions Requesting not to leave. Try to listen the noise, Which screams louder Louder than the silence. Try to look behind Behind every smile Drop by drop my heart is Sinking. Feel the heaviness Heaviness of my breath As I ,

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His phone is off…..

We used to walk, And long talks, While eating, Or while having a drink. Whenever he asked any work, I used to wink. My mother’s father, Was a nice friend of mine. We used to spend Great time. We watched movies together, Long discussions about the actors. But long ago he passed, His phone is

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Its never too late

We can if we wish, Returning is never so tough, It’s not mandatory, But it’s a choice, You can say openly, Who suppress your voice, And decision you make, Are not of iron, or steel, You can break them whenever you feel, And life is not a movie, Where you can rewind the reel, The

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Ozone (O3) is a powerful oxidising agent ?

ozone is a powerful oxidising agent as it gives nascent oxygen atoms on heating . nascent oxygen readily reacts with anything to oxidise it. O3    →    O2 + O contribute here to make this site more informative

Oxygen is a gas while sulphur is a solid ?

The catenation power of sulphur is higher than oxygen, due to this it exists as S8 molecule. and this molecule have strong intermolecular attractions. but on the other hand oxygen exists as O2 molecule, and this molecule being smaller in size has very less intermolecular attractions. and thus oxygen exists as gas and sulphur as

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Reimer-Tiemann Reaction.

It is the reaction that leads to the production of aromatic aldehydes mostly the ortho substituted ones. It is a reaction that yields orthohydroxy (major product) and para hydroxy (minor product). It basically a reaction between phenol and chloroform in the presence of aqueous sodium hydroxide. contribute to help us serve you better.

Stobbe reaction and its Mechanism

It is a type of condensation reaction that involves the condensation of an aldehyde or ketone with succinic ester in the presence of sodium ethoxide or Potassium ethoxide to yield unsaturated ester acid . The complete reaction is as below. The mechanism involves 3 steps , and firstly the succinate is treated with base to

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What is Hardy-Schulze rule ?

Hardy-Schulze rule It has two postulates (i) The ions which carry charge opposite to the particles of sol are more effective in causing the coagulation of the solution. (ii) Coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ions causing coagulation.

Why there’s no repulsion between electron in a coordinate bond?

The coordinate bond is formed by the overlapping of d-orbital of Central metal atom and the ligands. The d-orbitals are enough large that there is not any chance of repulsion between the resulting bond formation between the ligand and the metal atom. Thus there isn’t any repulsion.

Why lyophobic colloidal solutions are easily coagulated ?

Lyos – solution, phobic – hating(fear) Firstly in this case we have to understand that the lyophobic colloids are those in which the dispersed phase do not have affinity for the dispersion medium. So if we add any suitable electrolyte in it , the colloidal solution easily gets coagulated.

What are Multimolecular and Macromolecular colloids?

Multimolecular colloids are formed when the molecules of dispersed phase aggregate to make a molecule which is having the size between 1nm to 1000nm. The point to note here is , the particles of colloidal solution were of molecular size which joined to make Multimolecular system. Macromolecular colloids are the substances in which the size

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Why sky appears blue in colour ?

The particles of atmosphere which are of colloidal size can easily scatter the blue component of the light. The wavelength of blue light allows its scattering easily. That’s why it appears blue in colour.

Why does copper turns green on exposure to air ?

This happens because of corrosion of copper , as the copper is exposed to air it reacts slowly with water from the moisture present in air, carbondioxide and oxygen. And the product formed is a mixture of copper hydroxide and copper carbonate as shown below.

What is hydrogen bond? How does an intermolecular hydrogen bond differ from intramolecular hydrogen bond ?

Actually the hydrogen bond is simply a type of attraction which is caused by the the electronegativity difference between hydrogen and highly electronegative element like oxygen carbon nitrogen and fluorine. Intermolecular hydrogen bonding takes place between two molecules having hydrogen and electronegative element. Hydrogen is attracted by the electronegative element of another molecule for example

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What is gold number ?

It is the amount of lyophilic sol required in milligrams to prevent the the coagulation of 10ml gold sol by the addition of 1 ml, 10% NaCl solution .

What are Colligative properties ?

Actually the word co-ligative itself reveals that (“co” means each other and “ligative” means related) These are the properties which are related to each other. The colligative properties are those properties that depend on the number of solute particles in a solution or a mixture. “These properties don’t depend upon the nature of particles “.

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About Me

Hi, I’m Ankush Sharma. post graduate in chemistry and organic chemistry specialist

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