Chemistry MCQs

Page No. 68

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


a1 M ZnO solution

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b1 M ZnSO4 solution

✓


c1.5 M ZnSO4 solution

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d0.1 M ZnSO4 solution

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View Answer 1 M ZnSO4 solution

In Galvanic cell electrons flow from anode to cathode through__________________?


aexternal electric circuit

✓


bsalt bridge

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cmovement of ions

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dall of the above

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In electrolytic cell electricity carries________________?


aspontaneous reaction

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bnon-spontaneous reaction

✓


cneutralization

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dall of the above

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Electricity in voltaic cell is produced due to_________________?


aneutralization

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boxidation

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creduction

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dboth B & C

✓


View Answer Both B & C

Molten NaCl conducts electricity due to the presence of_______________?


aFree electrons

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bFree molecules

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cFree ions

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dAtoms of Na and Cl

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View Answer Free ions

In a galvanic cell________________?


aChemical energy is converted into electricity

✓


bChemical energy is converted into heat

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cElectrical energy is converted into chemical energy

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dElectrical energy is converted into heat

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In an electrolytic cell current flows ?


aFrom cathode to anode in outer circuit

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bFrom anode to cathode outside the cell

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cFrom cathode to anode inside the cell

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dboth B & C

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Which has maximum oxidation number ?


aN

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bCr

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cS

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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

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bColour of the solution becomes fade

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cCu is deposited at anode

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dAll are possible

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


aconcentrated

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bdilute

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csaturated solution

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dall of the above

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View Answer dilute

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