which of the following metals can's be extracted by the the carbon reduction precess ?

Options

A. `Zn`
B. `Fe`
C. `W`
D. `So`

Answer

c

Explanation

Although carbon is the cheapest avalible reducing agent , aluminum, cbhromium etc tyhet from very stable carbides
For example tungsten reacts and an externely hard meterial `(WC)` a arelatively unreactive and an extremently hard meterial which is used to make high speed cuting tools (it is used for cutting tools because ever its hardress ever at high temperature) Hydrogen and active metals , such as `Na,Mgand Al` are used as reducing agentws when `C` is unstable .The preferred method for producing taungstem (VI) oxide , a canary yellow compound obytained from the producessing of tangstem ore by heating it is a stream of hydrogen gas
`WO_(2)(s) + 3H_(2) (g) overset (850^(@)C) To W (s) + 3H_(2)O(g)`
One of the most important uses of tangstant metal is in the production of filaments for incandescent bulbs .The usage depends on the face that `W` has high stringth highest melting point `(3410^(@)C)` huighest holding point `(5900^(@)C)` of any metal, low voltallity and yhigh efficiency for converting electrical energy into light .To be useful , the incandescent filament in a light bulb must not mell and should not saporite excertively .The tengles metals filtament does slowly vaporize and we can after ore metal has condensed to block coating no the inside surface of a burned out bulb