Nitrogen in ammonia is sp3 hybridized but the ammonia molecule has trigonal pyramid geometry. Give reason

Ans. In NH3 molecule, the central atom of nitrogen has three unpaired electrons in the ground state. The nitrogen atom then undergoes sp3 hybridization and forms four sp3 hybrid orbitals. The three sp3 hybrid orbitals overlap with three s orbitals of hydrogen atom while the fourth hybrid orbital contains lone pair of electrons and does … Read more

Why some complexes of d-block elements are colorless i.e. white?

Ans. In some complexes, the metal ion has no electrons in the d-orbitals (d0 configuration). Thus, when the visible light spectrum(white light) passes through the solution, there are no electrons to absorb the wavelength of the light. hence, all the seven rays of white light are transmitted giving white colour which means the complex is … Read more

Why many compounds (or complexes) of d-block elements are coloured?

Ans.  D-block elements have electrons in the d-orbital. The d-orbitals split into two groups,t2g(lower energy) and eg(higher energy) in an octahedral complex. When white light falls in the complex compound, the electron of t2g orbital absorbs a certain wavelength from the white light(VIBGYOR) and moves to eg orbital. The remaining part of the light is … Read more

Factors Affecting Degree of Ionization | NEB |

There are different factors that affect the degree of ionization Nature of Electrolyte Nature of Solvent Temperature Dilution Nature of Electrolyte : The value of alpha depends upon the nature of electrolytes. Strong electrolytes like NaCl, KCl, Na2SO4, etc have higher values of α found to be nearly equal to 1. The strong electrolyte is … Read more