A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula $\mathrm{M}_2 \mathrm{O}_{\mathrm{n}}$ (where $\mathrm{n}=3,4,5$ ). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is. . . . . . ..$\mathrm{BM}$ (near integer)
(Given atomic number: $\mathrm{Sc}: 21, \mathrm{Ti}: 22, \mathrm{~V}: 23$, $\mathrm{Cr}: 24, \mathrm{Mn}: 25, \mathrm{Fe}: 26, \mathrm{Co}: 27, \mathrm{Ni}: 28, \mathrm{Cu}: 29$, $\mathrm{Zn}: 30)$
$1$
$2$
$3$
$0$
Which of the following is the correct sequence of atomic weights of given elements
Transition elements show high melting points. Why?
$E^o$ of $Cu$ is $+0.34\,V$ while that of $ Zn$ is $-\,0.76\,V$. Explain
Horn silver is
What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.