Ionic conductances of H+ and S at infinite dilution are x and y S cm2 equiv-1 . Hence , equivalent conductance of H2SO4 at infinite dilution is :
(x + y)
2(x + y)
2x + y
x + 2y
In the refining ofsilver by electrolytic method, what will be the weight of 100 g Ag anode if 5A current is passed for hours ? The purity of silver anode is 95% by weight.
42.91 g
57.59 g
13.16 g
36.38 g
Assertion : In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different from that required for 1 mole of copper.
Reason : The molecular weights of silver and copper are different.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false
B.
If both assertion and reason are true but reason is not the correct explanation of assertion
Ag+ + e- Ag
Cu2+ + 2e- Cu
For deposition of Ag, 1 mole of electrons is required while for Cu, 2 moles of electrons are required. So quantity of electricity needed for depositing is different.
What is the amount of chlorine liberated when 2A of current is passed for 60 minutes in an aqueous solution of NaCl?
2.507 g
1.364 g
2.648 g
3.469 g
Which of the following electrolytic solutions has the least specific conductance ?
0.02 N
0.2 N
2 N
0.002 N
The hydrogen electrode is dipped in a solution of pH = 3 at 25°C .The potential of the cell would be ,
(the value of 2.303 RT/F is 0.059 V)
0.177 V
0.087 V
-0.177 V
0.059 V
Assertion : Zinc displaces copper from copper sulphate solution.
Reason : The E of Zn is -0.76 V and that of Cu is +0.34 V.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Pure iron when heated in dry air is covered with a layer of rust.
Reason : Rust has the composition Fe3O2.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false