What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.
An alloy is a solid solution of two or more elements in a metallic matrix. It can either be a partial solid solution or a complete solid solution. Alloys are usually found to possess different physical properties than those of the component elements.
An important alloy of lanthanoids is Mischmetal. It contains lanthanoids $(94-95 \%),$ iron $(5 \%),$ and traces of $S, C, S i, C a,$ and $A I$ Uses
$(1)$ Mischmetal is used in cigarettes and gas lighters.
$(2)$ It is used in flame throwing tanks.
$(3)$ It is used in tracer bullets and shells.
The correct order of the first ionization enthalpies is
The colour of ${(N{H_4})_2}S{O_4}Fe{(S{O_4})_3}.24{H_2}O$ is
Which of the following order of atomic radius is not wrong
Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is $25$
Magnetic moment $2.84\, B.M.$ is given by (At. nos. $Ni = 28, Ti = 22, $$Cr = 24, Co = 27$)