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.
Tag Archives: chemistry
Out of alkenes (ethylene) and alkynes (acetylene) which is more acidic and why ?
The alkynes are more acidic in nature as compared to the alkenes . This is due to the fact that the alkynes give hydrogen on reacting with sodium metal, but Alkenes don’t give hydrogen. The alkynes release hydrogen and forms a sodium salt which clearly shows it’s acidic nature.
How does the value of rate constant vary with reaction concentration ?
the rate constant is a constant term , whose value does not change with change in concentration . thus the value of k doesn’t change.
Is sublimation a chemical change or a physical change ?
In a physical change the nature of substance remains same . The properties remains same. But in case of chemical change the new kind of substance is formed, with different nature. “Sublimation is a process in which a substance changes its state from solid into vapour directly”. So the point to note here is thatContinue reading “Is sublimation a chemical change or a physical change ?”
How many lone pairs of electrons exist on the central atom in ammonia (NH3)?
There is a single lone pair on Nitrogen atom in ammonia . You can see our detailed post for proper grip on this concept. https://theunconditionalguru.in/2020/04/11/how-to-find-a-lone-pair-in-simple-way/
How we can prepare Propanoic acid from butane-2-one and Butan-2-ol ?
In this method the methyl ketone is treated firstly with sodium hydroxide so we get the sodium salt of acid which is further treated with hydrochloric acid to get the final product , that is a carboxylic acid.
How we can prepare Phthalic acid from ortho xylene by oxidation?
It is a two step reaction in which 1. di-alkyl benzene is oxidised 2. In step two , the acidic environment helps in providing the Hydronium ions and they easily get converted into a carboxylic acid . Phtahlic Acid is used in various kind of preparations and has a vast industrial applications. In this reactionContinue reading “How we can prepare Phthalic acid from ortho xylene by oxidation?”
how we can prepare carboxylic acid (benzoic acid) from acyl halides and acid anhydrides (benzoic anhydride)
Preparation of carboxylic acids from acyl halides is a simple method in which the acid chloride or halide is hydrolysed to give carboxylic acids. The general reaction and examples are given below.. The hydroxyl group (OH group) present in water replaces the halide atom and thus forms the carboxylic acid. Various acids are formed byContinue reading “how we can prepare carboxylic acid (benzoic acid) from acyl halides and acid anhydrides (benzoic anhydride)”
Why Carboxylic Acids are more acidic than phenols ?
In case of carboxylic acids the negative charge is on the more electronegative element that is oxygen as shown in the structure in both of the resonating structures. The negative charge on the more electronegative element makes it more stable. And thus it shows acidic character easily. But in case of phenols the negative chargeContinue reading “Why Carboxylic Acids are more acidic than phenols ?”
The primary cells.
These are the cells in which non reversible redox reaction takes place. That is they can give electrical energy only once at the cost of reaction taking place in them , once the reaction is over , the cells get exhausted and can not be used again. And these cells can never be recharged agin.Continue reading “The primary cells.”
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 itContinue reading “SN1 mechanism”
The SN2 mechanism
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 andContinue reading “The SN2 mechanism”
How NH3 react with solution of Cu²+ ?
NH3 gives deep blue colored mine complex compound on reacting with Cu²+.
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 toContinue reading “Stobbe reaction and its Mechanism”
Why ortho-nitrophenol is more acidic than ortho-methoxy phenol ?
To answer this we have to see the reactive nature of phenol and the substituents attached to it. Acidic behavior of phenol depends on the fact that how easily it can loose a proton and make phenoxide ion which is stabilized by resonance. The methoxy group being electron donating group increases the electron density ofContinue reading “Why ortho-nitrophenol is more acidic than ortho-methoxy phenol ?”
What is the structure of XeOF4 and XeO3 ?
The structure of XeOF4 is square pyramidal. And its hybridization is sp³d² The structure of XeO3 is pyramidal and its hybridization is sp³.
Preparation of chlorobenzene – Sandmeyer’s reaction
Chlorobenzene and bromobenzene can be prepared by treating bezenediazonium chloride with cuprous chloride or cuprous bromide. This reaction is also called Sandmeyer’s reaction. The reaction is named after the Swiss Chemist Traugott Sandmeyer. In this reaction the diazonium group losses the molecule of dinitrogen and it yields chlorobenzene.
Why sigma bond is stronger than pi bond?
Actually the sigma bond involves head to head overlapping of orbitals, due to which the overlapping takes place on a larger extent. That makes the bond more stronger as compared to pie bond. In pie bond there is a sidewise overlapping of orbitals which leads to lesser extent of overlapping and thus the bond formedContinue reading “Why sigma bond is stronger than pi bond?”
What is Raoult’s law ?
It states that for a solution of volatile components, the partial vapour pressure of each component is directly proportion to the mole fraction of the component in the solution.
What are the factors that affect Vapour Pressure?
1.Temperature :- With increase in temperature the rate of vaporization also increase thus it creates more pressure. Moreover with increase in temperature the kinetic energy of the vapours also increase. 2. Nature of liquid:- The liquids with lower inter-particulate attractions have high vapour pressure as the formation of vapours is easy . Like acetone isContinue reading “What are the factors that affect Vapour Pressure?”
Calculation of edge length and radius of atom.
Calculate the radius of copper atom if it crystallise in face centred cubic lattice and has a density of 8.93 g / cm cube. Solution Structure given = fcc For fcc , Z = 4 Density , d = 8.93 Molar mass , M = 63.55 Avogadro number = 6.2×10^23 Use the given formula InContinue reading “Calculation of edge length and radius of atom.”
Which set of elements has a strong tendency to form cations? Or which of the elements are the most electropositive elements?
The elements belonging to Group 1 and group 2 of periodic table has the strong tendency to form cations. The reason behind this tendency is that the elements belonging to group 1 and 2 have one and two valance electrons respectively. By loosing the valence electrons, they will aquire noble gas configuration. It is easyContinue reading “Which set of elements has a strong tendency to form cations? Or which of the elements are the most electropositive elements?”
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