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Q.

The extraction and isolation of metals from ores involve the following steps:
I. Concentration of the ore.
II. Refining of metals.
III. Reduction of concentrated ore.
IV. Grinding of ore.
The option with correct sequence from the above steps will be

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a

$I \to II \to III \to IV$

b

$IV \to II \to III \to I$

c

$IV \to III \to II \to I$

d

$IV \to I \to III \to II$

answer is D.

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Detailed Solution

The extraction and isolation of metals from ores involve the following steps:
Grinding of ore
$↓$
Concentration of the ore
$↓$
Isolation of the metal from its concentrated ore, i.e. reduction of concentrated ore
$↓$
Purification of metal (i.e. refining of metal)

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The extraction and isolation of metals from ores involve the following steps:I. Concentration of the ore.II. Refining of metals.III. Reduction of concentrated ore.IV. Grinding of ore.The option with correct sequence from the above steps will be