Transition elements show high melting points. Why ?
Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form complex with ammonia
The spin only magnetic moment value of $Cr(CO)_6$ is
Chloro compound of vanadium has only spin magnetic moment of $1.73\,BM$ . This vanadium chloride has the formula :- (at no. of $V = 23$ )
$\operatorname{Zr}\,(\mathrm{Z}=40)$ and $\mathrm{Hf}\,(\mathrm{Z}=72)$ have similar atomic and ionic radii because of :
Steel differs from pig iron and wrought iron in that it contains