Chemistry-

General

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Question

Purpose of smelting of an ore is

(a) To oxidise it
To reduce it
(c) To remove vaporisable impurities
To obtain an alloy

The correct answer is: To reduce it

Smelting is a process of reducing metal oxide to metal by means of coke or $C O$ .
$F e subscript 2 end subscript O subscript 3 end subscript plus 3 C rightwards arrow 2 F e plus 3 C O$
$F e subscript 2 end subscript O subscript 3 end subscript plus 3 C O rightwards arrow 2 F e plus 3 C O subscript 2 end subscript$

Electric furnaces are lined with magnesia because

Chemistry-General

General

Chemistry-

When lime stone is heated strongly, it gives off $C O subscript 2 end subscript$ . In metallurgy this process is known as

Chemistry-General

General

Chemistry-

Important ore of Mg is

Important ore of Mg is
Chemistry-General

General
Chemistry-
The most important ore of tin is
The most important ore of tin is
Chemistry-General
General
Chemistry-
The principal ores of silver are argentite, horn silver and pyrargyrite. Their formula respectively are
The principal ores of silver are argentite, horn silver and pyrargyrite. Their formula respectively are
Chemistry-General
General
Chemistry-
Indicate the mineral from which copper is manufactured
Indicate the mineral from which copper is manufactured
Chemistry-General

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Purpose of smelting of an ore is

(a) To oxidise it To reduce it (c) To remove vaporisable impurities To obtain an alloy

The correct answer is: To reduce it

Smelting is a process of reducing metal oxide to metal by means of coke or .

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(a) To oxidise it
To reduce it
(c) To remove vaporisable impurities
To obtain an alloy

When lime stone is heated strongly, it gives off $C O subscript 2 end subscript$ . In metallurgy this process is known as

When lime stone is heated strongly, it gives off $C O subscript 2 end subscript$ . In metallurgy this process is known as

Important ore of Mg is
Chemistry-General