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JEE Advanced 2014Paper 1

Exam: JEE Advanced
Year: 2014
Paper: Paper 1
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Advanced 2014 · Paper 1 · Chemistry · General Principles and Processes of Isolation of Metals

Upon heating with C u _ 2 S , the reagent(s) that give copper metal...

Upon heating with

C{u}_{2}S

, the reagent(s) that give copper metal is/are

Options

A $CuFe{S}_{2}$
BCuO
C $C{u}_{2}O$
D $CuS{O}_{4}$

Correct answer

B. CuO

Step-by-step solution

A]

2CuFe{S}_{2} + {O}_{2}\overset{∆}{\to}C{u}_{2}S + 2FeS + S{O}_{2}

B]

4CuO\overset{{1100}^{o}C}{\to}2C{u}_{2}O + {O}_{2}

2C{u}_{2}O + C{u}_{2}S\overset{∆}{\to}6Cu + S{O}_{2}

C]

C{u}_{2}S + 2C{u}_{2}O\overset{∆}{\to}6Cu + S{O}_{2}

D]

CuS{O}_{4}\overset{{720}^{o}C}{\to}CuO + S{O}_{2} + \dfrac{1}{2}{O}_{2}

4CuO\overset{{1100}^{o}C}{\to}2C{u}_{2}O + {O}_{2}

2C{u}_{2}O + C{u}_{2}S\overset{∆}{\to}6Cu + S{O}_{2}

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