Question # 1

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

Oxidation number of phosphorus in the compound is.

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+3

+4

+5

+6

In lead accumulator cathode is made up of.

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Pb

Pb coated with PbO2

PbSO4

Mixture of Pb and PbO2

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

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

Standard hydrogen electrode has an arbitrarily fixed potential

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0.00 volts

1.00 volt

0.10 volt

None of these

Electrolysis is a process in which a chemical reaction takes place at the expense of

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Chemical energy

Electrical energy

Heat energy

None of these

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

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Decreases rapidly

Decreases slowly

Does not change

Drops of zero

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 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

Electrode of the lead storage battery are immersed in dilute H2SO4 which has strength by mass

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100%

98%

30%

10%

What is the oxidation state of sulphur in SO3^2-

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-4

-2

+2

+4

When an atom reacts chemically and loses one or more electrons it is.

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Decomposed

Reduced

Oxidized

Catalyzed

The voltage Nickel Cadmium cell is

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1 V

1.2 V

1.4 V

1.6 V

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

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