EASY
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The conduction of electricity through the electrolyte solution is due to________________?

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Important Questions on Thermal Effect and Chemical Effect of Current

MEDIUM
A solution of NiNO32 is electrolyzed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?
MEDIUM
When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produced is:
HARD
Calculate the molarity of a solution containing 5g of NaOH dissolved in the product of a H2-O2 fuel cell operated at 1A current for 595.1 hours.

(Assume 1F=96500 C/mol of electrons and molecular weight of NaOH as 40g mol-1 )
HARD
How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane? (Atomic weight of B=10.8 u)
EASY
Two Faraday of electricity is passed through a solution of CuSO4 . The mass of copper deposited at the cathode is: (Atomic mass of Cu = 63.5 amu)
MEDIUM

A current of 10.0 A flows for 2.00 h through an electrolytic cell containing a molten salt of metal X. This results in the decomposition of 0.250 mol of metal X at the cathode. The oxidation state of X in the molten salt is:

F=96,500 C

EASY
For electroplating, 1.5 amp current is passed for 250 s through 250 mL of 0.15 M solution of MSO4. Only 85% of the current was utilised for electrolysis. The molarity of MSO4 solution after electrolysis is closest to [Assume that the volume of the solution remain constant]
MEDIUM
The weight of silver (at.wt. =108) displaced by a quantity of electricity which displaces 5600 mL of O2 atSTP will be
MEDIUM
A constant current (0.5 amp) is passed for 1 hour through (i) aqueous AgNO3 . (ii) aqueous CuSO4 and (iii) molten AlF3 , separately. The ratio of the mass of the metals deposited on the cathode is [MAg, MCu, MAl are molar masses of the respective metals]
EASY
During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is
MEDIUM
Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, what is the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K)?
MEDIUM
4 g of copper was dissolved in  conc.HNO3. The copper nitrate thus obtained gave 5 g of its oxide on strong heating the equivalent weight of copper is
HARD
108 g of silver (molar mass 108 gmol-1) is deposited at cathode from AgNO3aq solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is x10. Value of 'x' to the nearest integer is _____.
EASY
The density of metal and equivalent weight of a metal are 10.5 g cm-3 and 100, respectively. The time required for a current of 3amp to deposit a 0.005mm thick layer of the same metal on an area of 80cm2 is closest to
EASY
A solution of NiNO32 is electrolyzed between platinum electrode 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode?
MEDIUM
One litre solution of MgCl2 is electrolyzed completely by passing a current of 1 A for 16 min 5 sec. The original concentration of MgCl2 solution was (Atomic mass of Mg=24)
MEDIUM
When 0.1 mol MnO42- is oxidized the quantity of electricity required to completely MnO42- to MnO4- is
EASY
The number of electrons delivered at the cathode, during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron =1.60×10-19 C)
MEDIUM
A fuel cell generates electricity by using methanol as fuel and O2 as the oxidant. Calculate the equivalent weight of methanol.
MEDIUM
In order to oxidize a mixture of one mole of each of FeC2O4,Fe2(C2O4)3,FeSO4 and Fe2(SO4)3 in acidic medium, the number of moles of KMnO4 is: