MCQ
In an electrochemical cell, cathode is:
- AAlways neutral.
- BAlways positive.
- ✓The electrode at which reduction takes place.
- DAlways negative.
✓
Answer
Correct option: C.
The electrode at which reduction takes place.
In an electrochemical cell, cathode is the electrode, at which reduction takes place and electrons are gained by some species.
Anode is the electrode, at which oxidation takes place and the electrons are lost by some species.
Anode is the electrode, at which oxidation takes place and the electrons are lost by some species.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Sulphur molecule is converted into sulphur ion, when it
Out of all the known elements the number of transitional elements is
Arrange the following in order of their reactivity toward decarboxylation reaction
→$\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{CH \equiv C - C - OH}
\end{array}}\limits_{\rm{I}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_2} = CH - C - OH}
\end{array}}\limits_{{\rm{II}}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_3} - C{H_2} - C - OH}
\end{array}}\limits_{{\rm{III}}} $$\mathop {\begin{array}{*{20}{c}}
\,\,\,{C{H_3}\,\,\,\,\,\,O}\\
\,\,\,{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_3} - CH - C - OH}
\end{array}}\limits_{{\rm{IV}}} $
Most stable oxidation state of iron is
Correct rate of reaction with $PhMgBr$ is
→$1\, \mathrm{~kg}$ of $0.75$ molal aqueous solution of sucrose can be cooled up to $-4^{\circ} \mathrm{C}$ before freezing. The amount of ice (in $g$) that will be separated out is .... . (Nearest integer)
→$\left[\right.$ Given $\left.: \mathrm{K}_{\mathrm{f}}\left(\mathrm{H}_{2} \mathrm{O}\right)=1.86\, \mathrm{~K}\, \mathrm{~kg}\, \mathrm{~mol}^{-1}\right]$
Hydroxide soluble in ammonia is
Which of the following statements about the composition of the vapour over an ideal $1: 1$ molar mixture of benzene and toluene is correct ? Assume that the temperature is constant at $25\,^o C$. (Given, vapour pressure data at $25\,^oC$, benzene $= 12.8\, kPa,$ toluene $= 3.85 \,kPa)$
→In the following given reaction ' $A$ ' is
→Compounds with antiseptic properties are $........$
$a. \mathrm{CHCl}_3$
$b. \mathrm{CHI}_3$
$c.$ Boric acid
$d. \text{0.3 ppm}$ aqueous solution of $\mathrm{Cl}_2$
→$a. \mathrm{CHCl}_3$
$b. \mathrm{CHI}_3$
$c.$ Boric acid
$d. \text{0.3 ppm}$ aqueous solution of $\mathrm{Cl}_2$