Question # 1

The gain of electron is known as.

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Oxidation

Reduction

Dehydration

Dehydrogenation

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

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

In given equation underlined element is. P+HNO3------------- H2PO4+NO+H2O

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Oxidized

Reduced

Neither oxidized nor reduced

Botha a and b

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

The oxidation of O -atom in OF3 is.

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-2

+2

-1

+1

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

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

In which compound the oxidation number of Mw is +6

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KMnO4

K2MnO4

MnO2

MnO

The cathodic reaction in the electrolysis of dil H2SO4 with Pt electrodes is.

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Reduction

Oxidation

Both oxidation or reduction

Neither oxidation nor raduction

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

Oxidation number of Cr in a C₂CrO₄ is

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+2

+4

+6

+8

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