In extraction of metal how many of the following ores involve calcination process
(i) Dolomite (ii) Malachite (iii) Clacite (iv) Copperpyrites (v) Cryolite (vi) Siderite (vii) Iron pyrite (viii) Agenite

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Solution

Calcination: The process of hesating an ore in the absence of air below its melting point is known as Calcination.
The calcination process removes volatile impurities form ore.

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Q. In extraction of metal how many of the following ores involves calcination process.
(i) Dolomite (ii) Malachite (iii) Calcite (iv) Copperpyrites (vi) Cryolite (vii) Siderite (viii) Iron pyrite (ix) Argentite.

Q. How many of the following ores belong to either aluminium or copper?
Bauxite, Siderite, Diaspore, Cuprite, Malachite, Carborundum, Kaolinite, Azurite,
Calamine, Cerussite, Cassiterite, Dolomite

List-I (Metal)	List- II (Ores)
(a) Aluminum	(i) siderite
(b) Iron	(ii) siderite
(c) Copper	(iii) Kaolinite
(d) Zinc	(iv) Malachite

For how many of the following ores calcinations is done during extraction of metals?___
(a) Haematite
(b) Calamine
(c) dolomite
(d) bauxite
(e) zinc blende

Q. How many of the following compounds have less

p K_{a}

than benzoic acid:
(i)HCOOH (ii)

C H_{3} C O O H

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In extraction of metal how many of the following ores involve calcination process(i) Dolomite (ii) Malachite (iii) Clacite (iv) Copperpyrites (v) Cryolite (vi) Siderite (vii) Iron pyrite (viii) Agenite

Calcination: The process of hesating an ore in the absence of air below its melting point is known as Calcination.The calcination process removes volatile impurities form ore.

In extraction of metal how many of the following ores involve calcination process
(i) Dolomite (ii) Malachite (iii) Clacite (iv) Copperpyrites (v) Cryolite (vi) Siderite (vii) Iron pyrite (viii) Agenite

Calcination: The process of hesating an ore in the absence of air below its melting point is known as Calcination.
The calcination process removes volatile impurities form ore.