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
These three words are commonly seen in the marketing industry just to sell their products. Everyone wishes to be lucky and once they see these magical words their psychological balance tilts towards the tempting offers and the whole affair ends up in just selling what they want to sale. I am not saying that we
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
Molarity : It decreases with increase in temperature. Molality : It remains constant . Doesn’t change.
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.
On addition of gelatin , the gold solution starts behaving like a lyophilic colloid . Otherwise the gold solution is lyophillic colliod.
the process of formation of colloids.
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 atomic
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.
Hi guys today we are going to talk about the white trail formation during the winter, when an aeroplane flies. To understand this phenomenon we must be aware of the combustion process taking place at the time of working of engine. During the combustion process, carbondioxide and water vapours are the major products. The water
the movement of colloidal particles under the influence of applied charge.
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
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.
The shielding effect , is seen when the electrons of inner shells shield the outer shell electrons from the nuclear charge. And this decreases the effective nuclear charge for the outer shell electrons. And hence they are less attracted towards the nucleus. This happens because of the higher penitration of the inner shell electrons. The
the atoms having same number of electrons, irrespective of atomic number or size or charge.
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.
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.
Ortho isomer shows intramolecular hydrogen bonding , in which the H-bonding takes place in a single molecule not with the adjacent molecule. And in that case the molecules exists as discrete molecules or particles only because they are not attached or attracted by each other. Thus their boiling point decreases and they are volatile. But
2g of H2 = 1mole = 6.022 x 10²³molecules So 1 g of H2 will have = 1/2 mole = 6.022 x 10²³ / 2molecules Number of atoms in hydrogen molecule = 2 Number of atoms in 1 g of H2 = 3.011 x 10²³ 32 g of O2 = 1 mole = 6.022 x
the atomic size of Krypton is larger than Bromine.
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
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 “.