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JEE Main 20169 AprilOnline
Exam
JEE Main
Year
2016
Date
9 April
Mode
Online
Subject
Chemistry
Chapter
Electrochemistry

JEE Main 2016 · 9 April · Online · Chemistry · Electrochemistry

What will happen when a block of copper metal is dropped into a...

What will happen when a block of copper metal is dropped into a beaker containing a solution of 1M1\text{M} ZnSO4ZnS{O}_{4}?

Options

  1. AThe copper metal will dissolve with evolution of oxygen gas.
  2. BThe copper metal will dissolve with evolution of hydrogen gas.
  3. CNo reaction will occur.
  4. DThe copper metal will dissolve and zinc metal will be deposited.

Correct answer

C. No reaction will occur.

Step-by-step solution

Zn is above Cu in electrochemical series. So, Zn will reduce Cu2+ to Cu.
Cu + Zn2+ → No reaction
Displacement reaction is feasible in opposite direction only.
Cu2+ + Zn → Zn2+ + Cu ↓↓
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