Which of the following methods is used for th | vedclass

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(A) The process of removing gangue (impurities like sand,soil,etc.) from the ore is known as concentration of ore or ore dressing.Common methods for c

Vedclass · Accepted Answer

Centrifugation

Vedclass · Answer

(A) The process of removing gangue (impurities like sand,soil,etc.) from the ore is known as concentration of ore or ore dressing.Common methods for concentration include hydraulic washing,magnetic separation,froth flotation,and leaching.$A$. Centrifugation is a physical method used for separation based on density,which is often employed in the concentration of ores.$B$. Calcination is a process of heating ore in the absence of air to remove volatile impurities and moisture.$C$. Roasting is a process of heating sulfide ores in the presence of excess air.$D$. Chemical reduction is used to extract metal from the concentrated ore.Therefore,centrifugation is a method used for the concentration of ore.

$X$	$Y$
$1.$ Dehydrating agent	$p.$ Sulphur dioxide gas
$2.$ In preparation of firecrackers	$q.$ Concentrated sulphuric acid
$3.$ Weak bleaching agent	$r.$ Dihydrogen gas
$4.$ Lightest gas	$s.$ Sulphur

Which of the following methods is used for the concentration of ore?

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Make correct pairs from the below-mentioned $X$ and $Y$:
$X$ $Y$
$1.$ Dehydrating agent $p.$ Sulphur dioxide gas
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