Question # 1

The conversion of potassium magnate to potassium permanganate by passing Cl2 Through aqueous solution of K2MnO4 is called.

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Contact process

Open hearth process

Stadeler's process

Thermite process

The percentage of carbon in different types of iron products is in the order of

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cast iron > wrought iron > steel

wrought iron > steel > cast iron

cast iron > steel > wrought iron

cast iron = steel > wrought iron

Which form interstitial compounds.

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Fe

Ni

CO

All of those

The chemical composition of pyrolusite is.

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KMnO4

K2MnO4

MnO2

MnO

Which one of the following elements commonly exhibits oxidation states of +6 and +3 in aqueous solution.

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Na

Cr

Mg

C

Which is not an ore of iron

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haematite

Magnetite

limonite

Cassiterite

Colour of K2Cr2O7 is

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Red

Orange

Green

Yellow

Co-ordination number of Pt in Pt Cl(NO₂)(NH₃)₄

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2-

4

1

6

The percentage of carbon is different types of iron products is in the order of.

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Cast iron > wrought iron > Steel

Wrought iron >Steel >Cast iron

Cast iron > Steel > Wrought iron

Which complex shows zero oxidation state of the transition metal.

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[Fe(CO)5]

K3[Fe(CN)6]

K2[Fe(CN)6]

[Cu(NH3)4]SO4

Which one of the following elements shows variable valency, can act as a catalyst and form coloured compounds.

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Carbon

Chlorine

Sulpur

Iron

To prevent corrosion, Iron pipes carrying drinking water are covered with zinc by

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alley formation

Electroplating

Galvanizing

Soldering

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

The strength of binding energy of transition elements depends upon

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number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Which of the following is non-typical transition metal

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Fe

Mn

Zn

Ni

Co-ordination number of Cu in

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Zero

Two

Four

Six

Which is not coloured ion

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SO4^-2

MnO4-3

CrO4^-2

Cr2O7^-2

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