Question # 1

If the salt bridge is not used between two half cells, then the voltage

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Decreases rapidly

Decreases slowly

Does not change

Drops to zero

In lead accumulator cathode is made up of.

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Pb

Pb coated with PbO2

PbSO4

Mixture of Pb and PbO2

If the salt bridge is not used between two half cells, then the voltage.

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Decrease rapidly

Decrease slowly

Drops to zero

Does not change

Electromotive force of the cell is the

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Difference of two electrode potentials

May be sum or the difference of two electrode potentials

Sum of two electrode potential

Depends upon the nature of the cell

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

If a strips of Cu metal is placed in a solution of FeSO4

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Cu will be precipitated down

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes palce

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

In silver oxide battery, the cathode is mad up of.

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AgO

Ag2O

Ag2O3

Ag

That cell in which electrical energy is converted into chemical energy is called

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Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

If strip of Cu metal is placed in the solution of FeSO4

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolves

No reaction takes place

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Fe is reduced

Fe is oxidized

CI₂is oxidized

None of these

In NICAD dry cell, the cathode and anode is made up of.

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Ca and Ag

Ni and CdO2

NiO2 and Cd

Ag and Ag2O

The cathodic reaction in the electrolysis of dil H2SO4, with pt electrode sis.

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

The reduction potential of Zn is.

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+0.76 V

-0.34 B

+0.34 V

-0.76 V

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

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Chemistry Fsc Part 1 Chapter 10 Online Test MCQs With Answers

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