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 .
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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.
What is the order of reactivity of halogen and alkyl groups in the dehydrohalogenation of alkyl halides to give alkenes ?
The reactivity of halogens :- The above order in case of halogens is due to the fact that the size of fluorine is small which makes a strong bond with carbon of alkyl group, thus makes it difficult to break. But on the other hand in case of Iodine the bond between Iodine and CarbonContinue reading “What is the order of reactivity of halogen and alkyl groups in the dehydrohalogenation of alkyl halides to give alkenes ?”
Write the structure of the alkene which on ozonolysis gives butanone and ethanal .
The alkene which will give butanone and ethanal on ozonolysis is 3-Methylpentene. It will dissociate from the double bond to give the products as shown below. By the ozonolysis we can get desired products.
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.
what is the difference between mechanical and chemical digestion ?
Mechanical digestion :- In this type of digestion the food is broken down into simple particles in mechanical way , like chewing in mouth by teeth and churning of food in stomach by the muscular movements of the smooth muscles of stomach walls. Chemical digestion :- In this type of digestion the complex molecules ofContinue reading “what is the difference between mechanical and chemical digestion ?”
Is melting of ice a chemical change ?
No , melting of ice will not be a chemical change as it simply involves the change in the state of water. But during this change the colour, odour, taste , chemical or molecular formula will remain the same . And these all are the indications of physical change only.
what does the arrow in a chemical equation mean ?
The arrow in between the chemical equation is an important part of the equation. It depicts that the reactants are converted into products. Or in simple language we can say it shows the conversion of reactants into products. On its left hand side are the reacting species and on its right hand side are theContinue reading “what does the arrow in a chemical equation mean ?”
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 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)”
The structure of SF6 and how many atoms can lie on a single plane ?
In case of SF6 the hybridisation is sp3d2 and the structure is octahedral . In the view this structure the four Florine atoms are in equatorial position and two are in the axial position. and thus there are maximum of five atoms present in a single plane .
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”
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”
How the age of mummies , dead bodies and fossils is calculated?
The aging of different organisms is mainly calculated by the special technique called the Radiocarbon dating. In this technique the age of any specimen is calculated on the basis of the present amount of an isotope of a particular element. Isotopes are the atoms of an element that have same atomic number but different atomicContinue reading “How the age of mummies , dead bodies and fossils is calculated?”
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.
What are isoelectric species? And What determines the difference in the size of atoms or ions if they are isoelectronic ?
the atoms having same number of electrons, irrespective of atomic number or size or charge.
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.
How many lone pairs of electrons are on the S atom in sulphur tetra floride (SF4) ?
In case of SF4 there are 6 electrons in the outermost shell of Sulphur, out of these 6 electrons, 4 are utilized in bonding with fluorine and thus two unshared electrons are there. Which leads to the lone pair as shown below. Contribute to make this site more informative.
Why is Krypton larger in size than bromine,even if atomic radius decreases while going from left to right across a period?
the atomic size of Krypton is larger than Bromine.
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 exampleContinue reading “What is hydrogen bond? How does an intermolecular hydrogen bond differ from intramolecular hydrogen bond ?”
Why the electron affinity or electron gain enthalpy of Chlorine is higher than Fluorine ? Even if Fluorine is most electronegative element.
chlorine shows exceptionally higher electron gain enthalpy than that of florine.
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