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 […]
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 […]
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 […]
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 “. Following are the colligative properties:- […]
Why is carbon important for forming complicated molecules? Or why carbon makes a large number of molecules ?
The answer to this question is very simple . There are two major reasons behind it. 1. Catenation :- It is the property by which the carbon can make long chains, branched chains and ring or cylic structural by joining with its own atoms. Due to this it can make a variety of molecules. 2. Tetravalency :- carbon has 4 […]
Why H3PO3 is a diprotic acid? Give reason with structure .
Meaning of diprotic acid is that , it can loose two hydronium ions (H+) . For finding how many H+ ions it can give , we have to see its […]
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.
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 formed is not so strong as […]
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. […]
Semiconductor and its types.
The substances whose conductivity lies between 10-⁶ to 10⁴ ohm-¹ . The range lies between conductors and insulators. Types 1. n-type :- These type of semiconductors have excess electrons present […]
What is Coordination number
It is the number of lattice points touching one lattice point in a crystalline solid. For example in case of Sodium chloride it is 6 .
Explanation of Paramagnetism, ferromagnetism, ferrimagnetism and antiferromagnetism .
1. Paramagnetism :- This is the phenomenon by which substances are weekly attracted by the magnetic field. It arises because the substances are magnetized in the same direction of the […]
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 […]
Why we have to provide activation energy for completion of a reaction?
To understand this concept we must be aware of Threshold energy or activation energy. The threshold energy or the activation energy is the minimum amount of energy that is required for the conversion of reactants into the products . According to collision theory the reactant species collide with each other to make the product. But every collision don’t bring about […]
What is the decreasing reactivity order of halogen hydracids (HCl, HI, HBr) for addition reaction of alkenes? Explain.
The decreasing order of reactivity will be as follows:- HI > HBr > HCl In case of reactivity the HI will be the most reactive and then HBr and least reactive will be the HCl. This is due to the fact that the reducing character of Iodine is highest and it can easily break the H-I bond and thus can […]
If I have hydrogen and oxygen so how can I get water back from both the gases?
The answer is simple just look at the combustion reaction of the hydrogen and you will get water.
What are the chemical properties of Haloalkanes and Haloarens ?
What are the methods of Prepration of ethers?
What are the methods of preparation of Haloalkanes and haloarenes ?
How the eye accommodates to light ?
#accomodation #of #light In our day to day life we face various exposure to light. The intensity of rays vary from source to source some are intense and some are […]
Why owl can see in night ?
Interesting fact about Owl We all know that the owl is capable of night vision due its special eyes. But more than this I have noticed a unique feature in […]
