Stainless steel does not rust because

  • A

    Chromium and nickel combine with iron

  • B

    Chromium forms an oxide layer and protects iron from rusting

  • C

    Nickel present in it, does not rust

  • D

    Iron forms a hard chemical compound with chromium present in it.

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For which of the following transition metal ion is shown highest magnetic moment having outer electronic configuration

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: $\mathrm{Sc}: 21, \mathrm{Ti}: 22, \mathrm{~V}: 23$, $\mathrm{Cr}: 24, \mathrm{Mn}: 25, \mathrm{Fe}: 26, \mathrm{Co}: 27, \mathrm{Ni}: 28, \mathrm{Cu}: 29$, $\mathrm{Zn}: 30)$

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Bell metal is an alloy of

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