• # 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)    $NaCl$

$NaCN$ 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).