Magnese metal is extracted from manganese dioxide by a reduction process by making use of :
(a) carbon (b) hydrogen (c) electrolysis (d) aluminium

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Solution

(d) aluminium
There are some metals that cannot be satisfactorily reduced by carbon. In such cases, aluminium is used as a reducing agent, e.g., manganese.

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Similar questions

Q. Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium

Name one metal each which is extracted by:
(a) reduction with carbon. (b) electrolytic reduction.
(c) reduction with aluminium (d) reduction with heat alone.

The two metals which are extracted by means of electrolytic reduction of their molten salt are:
(a) magnesium and manganese (b) iron and aluminium
(c) zinc and magnesium (d) magnesium and aluminium

Q. Match the entries of column- I with appropriate entries of column- II

Column-I (Metal to be extracted)	Column-II (Method used for reduction of oxide)
(A) Iron or Zinc	(i) Reduction with aluminium
(B) Manganese or Chromium	(ii) Reduction with Carbon
(C) Mercury	(iii) Electrolytic reduction
(D) Aluminium	(iv) Reduction of heating alone

Q. Metals like sodium, potassium, calcium and magnesium are extracted by electrolysis of their chlorides in molten state. These metals are not extracted by reduction of their oxides with carbon because:
a) Reduction with carbon is very expensive
b) Carbon readily makes alloys with these metals
c) Carbon has less affinity for oxygen than these metals
d) Carbon is a weaker reducing agent than these metals

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Magnese metal is extracted from manganese dioxide by a reduction process by making use of : (a) carbon (b) hydrogen (c) electrolysis (d) aluminium

(d) aluminium There are some metals that cannot be satisfactorily reduced by carbon. In such cases, aluminium is used as a reducing agent, e.g., manganese.

Magnese metal is extracted from manganese dioxide by a reduction process by making use of :
(a) carbon (b) hydrogen (c) electrolysis (d) aluminium

(d) aluminium
There are some metals that cannot be satisfactorily reduced by carbon. In such cases, aluminium is used as a reducing agent, e.g., manganese.