Chemistry MCQs

Page No. 68

For the measurement of standard electrode potential Zn is dipped in________________?


a1 M ZnO solution


b1 M ZnSO4 solution


c1.5 M ZnSO4 solution


d0.1 M ZnSO4 solution


View Answer 1 M ZnSO4 solution

In Galvanic cell electrons flow from anode to cathode through__________________?


aexternal electric circuit


bsalt bridge


cmovement of ions


dall of the above



In electrolytic cell electricity carries________________?


aspontaneous reaction


bnon-spontaneous reaction


cneutralization


dall of the above



Electricity in voltaic cell is produced due to_________________?


aneutralization


boxidation


creduction


dboth B & C


View Answer Both B & C

Molten NaCl conducts electricity due to the presence of_______________?


aFree electrons


bFree molecules


cFree ions


dAtoms of Na and Cl


View Answer Free ions

In a galvanic cell________________?


aChemical energy is converted into electricity


bChemical energy is converted into heat


cElectrical energy is converted into chemical energy


dElectrical energy is converted into heat



In an electrolytic cell current flows ?


aFrom cathode to anode in outer circuit


bFrom anode to cathode outside the cell


cFrom cathode to anode inside the cell


dboth B & C



Which has maximum oxidation number ?


aN


bCr


cS


dMn


View Answer Mn

If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?


aH2 is deposited at cathode


bColour of the solution becomes fade


cCu is deposited at anode


dAll are possible



The relative lowering of vapour pressure is directly proportional to molality if the solution is________________?


aconcentrated


bdilute


csaturated solution


dall of the above


View Answer dilute

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