Skip to content

Tag: what

chemistry 0

What are the Characteristics of a lone pair ?

What are the characteristics of a lone pair? Characteristics of a lone pair Lone pair are the pair of electrons that do not take part in any chemical bond. They affect the symmetry of molecule or the shape of molecule as they interfere with the other electrons of the molecule . The electrons of lone pair repel the other bond […]

chemistry 0

What are the Banana Bonds?

What is a ”three centre two electron bond”? These are the type of covalent bonds in which overlapping of orbitals of three atoms take place but sharing only two electrons. These type of bonds that are found in electron deficient molecules. for example in case of BF3 , the molecule exists as a dimer that is B2F6 . Here the […]

chemistry 0

Azeotropes

What are azetopes? Azeotropes are the constent boiling mixtures or solutions. it means that these mixtures can not be separated by simple distillation or boiling , because they will have the same composition of mixture even in the vapour state. for example as in case of mixture of nitric acid and water, the highest attained concentration of the nitric acid […]

chemistry 0

Why does a covalent bond not form a crystal lattice?

Covalent bond and ionic bond has a very basic difference that is presence of ions or not. The ionic bonds are not limited to one ion only, actually they keep on joining again and again because they are held together by basically the electrostatic forces, due to the oppositely charged ions. lets take example of NaCl molecule. The positively charged […]

chemistry 0

What is an electrophile?

See electrophile word is made up by the joining of two words “electro+phile. Electro means the “electron “ and phile means “loving” in short the electrophile is electron loving specie or attacking reagent that attacks only on the part of molecule with high electron density. For example :- H+ , H3O+ , NH4+   and BF3 etc

chemistry 0

What is the difference between stereoisomers, optical isomers and enantiomers?

Stereoisomers :- These are the compounds that have same molecular formula but different arrangement of atoms in the space. Optical isomers :- The compunds that have same molecular formula but they rotate the plane polarised light to the different side, right side-dextrorotatory and left levorotatory. Enantiomer :- These are the compounds that are mirror images of each other and if […]

chemistry 0

What is a racemic mixture?

On the basis of Optical activity the compounds or isomers can be classified into two types:- Those rotate the plane polarised light towards right called the dextro rotatory compounds. Those rotate the plane polarised light towards left are called Laevo rotatory compounds. The equimolar composition of the above two isomers is called racemic mixture.

science 0

Terms related to mass

Atomic mass Atomic mass of an element is the relative mass as compared with an atom of carbon 12 and it is expressed in AMU. A.M.U. AMU is the Atomic mass unit and it is defined as the mass equal to 1 by 12th of the mass of carbon 12 isotope. 1 amu = 1.66056x 10-24 Molecular mass It is […]

chemistry 0

Neutralisation reaction

The reaction between an acid and base to give salt and water is called neutralisation reaction. here in the following reaction we can easily see how Hydrochloric acid is reacting with sodium chloride NaOH + HCl ———> NaCl + H2O the nature of salt formed is dependent on the type of acid or base , if there is any difference then […]