Question # 1

Which has greater reduction potential

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Na

H2

Zn

F2

In electrolysis of aqueous NaCl, Cl-ions are.

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Oxidized at anode

Oxidized at cathode

Reduced at cathode

Neither oxidized nor reduced

In Daniel cell, if salt bridge is removed between the two half cells, the voltage.

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Drops to zero

Does not changes

Increases gradually

Increases rapidly

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

The reduction potential of Zn is.

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+0.76 V

-0.34 B

+0.34 V

-0.76 V

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

Oxidation number of phosphorus in the compound is.

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+3

+4

+5

+6

The oxidation of O -atom in OF3 is.

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-2

+2

-1

+1

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

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AgO

Ag2O

Ag2O3

Ag

The voltage Nickel Cadmium cell is

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1 V

1.2 V

1.4 V

1.6 V

When a non-spontaneous redox reaction is carried out by using the electrical current, then the process is called

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Decomposition of the substances

Cracking

Hydrolysis

Electroiysis

In the reaction 2Fe+3Cl2 ------------ FeCl2

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Fe is reduced

Fe is oxidized

Cl2 is oxidized

None of these happens

A single lead cell provides volts

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2

4

6

8

Standard hydrogen electrode has an arbitrarily fixed potential

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0.00 volts

1.00 volt

0.10 volt

None of these

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

What is oxidation state of chlorine in Ca(ClO3)2

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+1

+3

+5

+7

Which statements not correct about Galvanic cell.

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Anode in negatively charge

Reduction occur at anode

Cathode is positively charged

Reduction occur at cathode

The over all positive value for the reaction potential predicts that process is energetically.

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Not feasible

Feasible

Impossible

No indication

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