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

131. Write the cell reactions which occur in lead storage battery (i) when the battery is in use and (ii) when the battery is on charging.

2781 Views

132. The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 s cm^–1. Calculate its molar conductivity.

152 Views

133.

How much charge is required for the following reductions:
1 mol of Al³⁺ to Al?

129 Views

134.

How much charge is required for the following reductions:
1 mol of Cu²⁺ to Cu?

154 Views

135.

How much charge is required for the following reductions:
1 mol of MnO₄^– to Mn²⁺?

192 Views

136. How much electricity in terms of Faraday is required to produce
20.0 g of Ca from molten CaCl₂?

277 Views

137. How much electricity in terms of Faraday is required to produce
40.0 g of Al from molten Al₂O₃?

262 Views

138. How much electricity is required in coulomb for the oxidation of
1 mol of H₂O to O₂ ?

2 H_{2} O \to 4 H^{+} + O_{2} + 4 e 2 mol 4 mol or 4 F

1 mol of H₂O will give one atom of O

Charge on O = – 2

Electricity required =n F

= 2 × 96487 Coulombs

= 192974 Coulombs

= 1.93 × 10⁵ Coulombs

151 Views

139. How much electricity is required in coulomb for the oxidation of
1 mol of FeO to Fe₂O₃

244 Views

140. A solution of Ni(NO₃)₂ is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

243 Views

Previous Year Papers

Test Series

Test Yourself

Short Answer Type

138. How much electricity is required in coulomb for the oxidation of1 mol of H2O to O2 ?

138. How much electricity is required in coulomb for the oxidation of
1 mol of H₂O to O₂ ?