Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Electrochemistry

Short Answer Type

241. How is an electrode potential measured?

126 Views

242. Write a Nernst equation for the half-cell reaction: Mⁿ⁺(aq) + ne^– → M(s)

545 Views

243. Write the Nernst equation for a galvanic cell corresponding to the reaction:
$Zn (s) + {Cu}^{2 +} (aq) \to Zn (aq) + Cu (s)$

$Zn (s) + {Cu}^{2 +} (aq) \to Zn (aq) + Cu (s)$
In Daniell cell, the electrode potential for any given concentration of
Cu²⁺ and Zn²⁺ ions, we write
For cathode:-
$E_{\frac{{Cu}^{2 +}}{Cu}} = E_{\frac{{Cu}^{2 +}}{Cu}}^{0} - \frac{RT}{2 F} In \frac{1}{{Cu}^{2 +}} For anode : - E_{\frac{{Zn}^{2 +}}{Zn}} = E_{\frac{{Zn}^{2 +}}{Zn}}^{0} - \frac{RT}{2 F} In \frac{1}{{Zn}^{2 +}} thus nernst equation is : E_{cell} = E_{cell}^{0} - \frac{RT}{nF} \ln \frac{[{Zn}^{2 +}]}{[{Cu}^{2 +}]}$

153 Views

244.

Electrolysis of molten NaCl gives sodium at cathode while aqueous NaCl gives H₂ gas at cathode.

172 Views

245. What is dry cell? Explain its working.

315 Views

246. Draw curves to show how the molar conductance of strong electrolytes varies with dilutions.

127 Views

247. How the Kohlrausch’s law is used to determine the degree of ionization of weak electrolyte?

198 Views

248. For the cell Zn/Zn²⁺ (aq) || Cu²⁺(aq) | Cu, derive the relation between E°_cell and K_c at 298 k.

198 Views

249. For the standard cell, Cu(s) | Cu²+(aq) || Ag⁺ (aq) | Ag(s)
Given: E° _Cu²⁺/Cu = 0.34V, E° = 0.80V
(a) Identify cathode and anode as the current is drawn through the cell.
(b) Write the reactions taking place at the electrodes.
(c) Calculate the standard cell potential.

193 Views