Calcium is obtained by

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(D) The correct answer is $D$.Calcium is an alkaline earth metal,which is highly reactive and cannot be obtained by carbon reduction.It is extracted b

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Electrolysis of molten $CaCl_2$

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(D) The correct answer is $D$.Calcium is an alkaline earth metal,which is highly reactive and cannot be obtained by carbon reduction.It is extracted by the electrolysis of molten $CaCl_2$ (fused salt) because electrolysis of aqueous $CaCl_2$ would result in the evolution of hydrogen gas at the cathode instead of calcium metal.At the cathode: $Ca^{+2} + 2e^{-} 	o Ca$At the anode: $2Cl^{-} 	o Cl_2 + 2e^{-}$

Metals	Ore
$1$. Barium	$d$. Witherite
$2$. Magnesium	$a$. Carnallite
$3$. Potassium	$b$. Sylvine
$4$. Strontium	$c$. Celestine

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Metals Ore

$1$. Barium $d$. Witherite

$2$. Magnesium $a$. Carnallite

$3$. Potassium $b$. Sylvine

$4$. Strontium $c$. Celestine

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