Q. 315.0( 5 Votes )
How is manganese extracted from manganese dioxide, Mn02? Explain with the help of an equation.
Answer :
Manganese metal is extracted by the process of reduction of its oxide with aluminium powder as the reducing agent. That is why, when manganese dioxide is heated with aluminium powder, then manganese metal is formed.
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PREVIOUSFill in the following blanks with suitable words:
(a) The corrosion of iron is called ................
(b) ................ and ................ are necessary for the rusting of iron.
(c) The process of depositing a thin layer of zinc on iron articles is called................
(d) Tiffin boxes are electroplated with ................ but car bumpers are electroplated with ................ to protect them from rusting.
(e) The corrosion of copper produces a ................ coating of basic copper carbonate on its surface.
(f) Brass is an alloy of copper and ..............
(g) Bronze is an alloy of copper and ..............
(h) The non-metal present in steel is ..............
(i) The alloy in which one of the metals is mercury is called an.............
(j) The electrical conductivity and melting point of an alloy is .............. than that of pure metals.
(k) The rocky material found with ores is called..............NEXTWhat is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
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