Ag 2 S + NaCN → A A + Zn → B (B) is a metal. Hence, (A) and (B) are

Ag 2 S + 4 NaCN → 2 Na Ag CN 2 + Na 2 S A 2 Na Ag CN 2 + Zn → 2 Ag + Na 2 Zn CN 4 B

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Chemistry - General Principles and Processes of Isolation of Metals Question with Solution | TestHub

ChemistryGeneral Principles and Processes of Isolation of MetalsGeneralEasy2 minPYQ_2020

ChemistryEasysingle choice

$\begin{matrix} {Ag}_{2} S + NaCN & \to & (A) \\ (A) + Zn & \to & (B) \end{matrix}$

(B) is a metal. Hence, (A) and (B) are

Options:

Answer:

Solution:

$\begin{matrix} {Ag}_{2} S & + & 4 NaCN & \to & 2 Na [Ag {(CN)}_{2}] & + & {Na}_{2} S \\ A \end{matrix}$

$\begin{matrix} 2 Na [Ag {(CN)}_{2}] & + & Zn & \to & 2 Ag & + & {Na}_{2} [Zn {(CN)}_{4}] \\ B \end{matrix}$

Stream:NTA_ABHYASSubject:ChemistryTopic:General Principles and Processes of Isolation of MetalsSubtopic:General

⏱ 2mℹ️ Source: PYQ_2020

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