What is electron affinity ? The  amount of energy  released when an electron is added to the valence shell of an isolated gaseous ato...

How does ionization potential depends on atomic size ? Th e larger the atomic size, the smaller is the ionization potential .This is d...

What is penetration effect ? The probability of electrons coming closer to the nucleus in their motion around the nucleus is called pene...

What is ionization energy ? The ionization energy of an element is defined as the amount of energy required  to remove an outer most va...

Why quinuclidine is a stronger base than N,N dimethyl aniline ? In N,N dimethyl aniline the electron pair on N-atom can undergo reson...

What is hydrogen bonding ? When a proton donor group interacts with an electron donor having a lone pair of electrons or a pi bond, a ...

What is elements of symmetry ? Organic molecules are covalent compounds having definite bond length and bond angles among the constituen...

What is shielding effect ? In multi-electron atoms, there are a number of electrons .Some of them,occupying lower energy orbitals, te...

What is periodicity ? In periodic table, it has been found that elements withsimilar properties fall in the same group. The repetitio...

Ring-chain isomerism and metamerism. What is ring-chain isomerism ?  Two structural isomers having the same molecular formula but ...

What is isomerism ? When two or more organic compounds having same molecular formula but with different chemical structure due to diffe...

What is tautomerism? When two structural isomers are inter converted to each other very rapidly keeping up a dynamic equilibrium state...