• # question_answer   Which of the following is used in the extraction of silver? A)  $NaCN$                   B) $N{{a}_{2}}S{{O}_{4}}$ C)   $N{{a}_{2}}C{{O}_{3}}$D)    $NaCl$

Correct Answer: A

Solution :

$NaCN$ forms a soluble complex with $AgCl$ or $A{{g}_{2}}S.$Therefore, $NaCN$ is used. $4NaCN+A{{g}_{2}}S\to Na[Ag{{(CN)}_{2}}]+N{{a}_{2}}S$ Hence, the correct option is (a).

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