Prof. Anil Thomas and Prof. Santosh Yadav Solutions for Chapter: Electrochemistry, Exercise 2: Critical Thinking

Which of the following is the reduction half-reaction for a lead storage battery?

In the ${\mathrm{H}}_2–{\mathrm{O}}_2$fuel cell, the electrodes are made up of ______.      

Which of the following is wrong regarding fuel cell?

If the half cell reaction, $\mathrm{A} + {\mathrm{e}}^{-}\to {\mathrm{A}}^{-}$, has a large negative reduction potential, it follows that_______.       

$\mathrm{Li}, \mathrm{Ca} \text{and} \mathrm{K}$ metals can be arranged in the decreasing order of their standard reduction potentials as ____:

When a piece of copper is placed in an aqueous solution of silver nitrate, the colour of the solution becomes blue. This is due to______ 

The standard reduction potentials of ${\mathrm{A}}^{+}/\mathrm{A}, {\mathrm{B}}^{+}/\mathrm{B}$and ${\mathrm{C}}^{+}/\mathrm{C}$are $+3.03 \mathrm{V}$, $–0.70 \mathrm{V}$ and $–0.42 \mathrm{V}$, respectively. Which of the following reactions is spontaneous?

The rusting of iron is catalysed by which of the following?