The reactivity of Aldehydes depend upon two factors . 1 Steric effect :- The reactivity of aldehyde depends upon the fact that the nucleophile will attack on the Carbon atom of the carbonyl group. If it is less crowded the nucleophile can easily approach it and can easily react. So lesser is the hinderance moreContinue reading “Why Formaldehyde is more reactive then other aldehydes? justify .”
Category Archives: chemistry
why do aldehydes and ketones undergo nucleophillic addition reaction ?
in case of aldehydes and ketones there is a carbonyl group present in the molecule as shown below :- The oxygen is more electrongative than the carbon , due this the polarity develops in the C=O bond. The carbon becomes partially positive and the oxygen becomes partially negative . This decreases the electron density onContinue reading “why do aldehydes and ketones undergo nucleophillic addition reaction ?”
what is the difference between Schottky defect and frankel defect ?
A solid has NaCl structure. If the radius of cation A is 100 pm, what is the radius of anion B?
Here is the solution:-
An element having BCC geometry has atomic mass 60 gram per mol. calculate density of unit cell if its edge length is 300 pm.
Here is the solution :-
What is the name of K[Ag(CN)2] ?
K[Ag(CN)2] Potassium dicyanidoargentate (I)
What is the structure of XeOF2
Sing , roam aimlessly , dance, talk with friends and play with kids
List five things you do for fun.
How would you account for the variation of ionisation enthalpies ( first and second) in the first series of the transition elements?
what are transition metals and why they are called so ?
These are the elements which invove the filling of d-subshell. And these elements lie in between the s-block and p-block elements so these are known as transition elements.
The rate constant of a first order reaction is 3.0 x 10 -8 s-1 . what is the rate of the reaction when the concentration of reactant is 1.5 mol L-1 ?
The rate constant of a first order reaction is 3.0 x 10 -8 s-1 . what is the rate of the reaction when the concentration of reactant is 1.5 mol L-1
For the reaction : N2 + 3H2 → 2NH3 , the rate of reaction measured as ∆[NH3]/∆t was found to be 2.4 x 10-4 mol L-1 s -1 . Calculate the rate of reaction expressed in terms of (i) N2 and (ii) H2 .
Question : For the reaction : N2 + 3H2 → 2NH3 , the rate of reaction measured as ∆[NH3]/∆t was found to be 2.4 x 10-4 mol L-1 s -1 . Calculate the rate of reaction expressed in terms of (i) N2 and (ii) H2 .
Solved numericals related to chemical kinetics
Calculation of the rate of reaction. Here we have some examples here is the solution
Learn periodic table in just 25 minutes in punjabi .
you can learn the complete chapter in just 25 minutes.
Quick and easy way to learn the organic nomenclature (with video).
Most of the students find it difficult to learn and apply the knowledge related to the organic nomenclature. Here in this post you simply need to memorise the following table and after that there are a few steps related to that.
How we can make epoxyethane from ethene and epoxypropane from propene ?
It can be done by the following reaction.
How the direct hydration of alkene is done ?
The direct hydration of alkene leads to the formation of alcohols. The reaction takes place according to the markovnikov’s rules for addition reaction. For example we can make 2-methyl propan-2-ol (tertiary – butyl alcohol) from 2- methyl propene (Isobutylene) as shown in the above reaction.
How we can make ethylene chlorohydrin from ethylene ?
The ethylene chlorohydrin can be prepared by the reaction of ethylene with Hypochlorus acid (Hypohalus acid) It is a kind of addition reaction.
How alkene reacts with hypohalus acid (HOX) ?
It is a type of addition reaction in which the hydroxyl and halogen groups are introduced in alkene molecule . The alkenes react with freshly prepared solution of hypohalus acid. The acid is formed by the reaction of dihalogen with water. The hypohalus acid gives Halohydrin on reacting with alkene.
What is the mechanism for anti markovnikov addition or kharasch effect or peroxide effect ?
The mechanism for this kind of reaction involves the formation of free radicals, and the relative stability of different molecules will decide the formation of major and minor products. Step 1 , Chain initiation :- First of all , the homolytic cleavage takes place in peroxide molecule as shown below :- Step2 Chain propagation :-Continue reading “What is the mechanism for anti markovnikov addition or kharasch effect or peroxide effect ?”
What is anti markovnikov addition or peroxide effect or Kharasch effect ?
It is the phenomenon which is seen in case of addition of hydrogen halide in the presence of a peroxide like benzoyl peroxide. The major product in this kind of reaction is the alkane in which the halide is attached to terminal or the less substituted carbon atom as shown below.
Why the but-2-ene is major product of beta elimination of 2-Bromobutane ?
This is due to the following reason :- This is in accordance with sytzeff rule that whenever two alkenes are theoretically possible during a dehydrohalogenation reaction , it is always the more highly substituted alkene which predominates . It can also be best understood by the following illustrations showing the stabilizes of primary(1°) , secondaryContinue reading “Why the but-2-ene is major product of beta elimination of 2-Bromobutane ?”
What are the products of beta elimination of haloalkanes?
The haloalkanes give alkenes on undergoing beta elimination. But in case if we there is unsymmetrical haloalkane , the product formation follows Sytzeff rule as shown below.