JEE Main 2016 · 9 Apr · Shift 1 · Chemistry Q38

ChemistrySingle correct+4 / -1Question 38 of 90

What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M $\ce{ZnSO4}$ ?

The copper metal will dissolve and zinc metal will be deposited.

The copper metal will dissolve with evolution of hydrogen gas.

The copper metal will dissolve with evolution of oxygen gas.

No reaction will occur.

Answer and worked solution

Official answer: D

Copper ( $E^\circ=+0.34$ V) cannot reduce $\ce{Zn^2+}$ ( $E^\circ=-0.76$ V), so nothing happens.

JEE Main 2016 · 9 Apr · Shift 1, Chemistry question 38