Question # 1

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

f-block elements are also called

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non typical transition elements

outer transition elements

normal transition elements

inner transition elements

The chemical composition of pyrolusite is.

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KMnO4

K2MnO4

MnO2

MnO

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

Total number of d-block elements are

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10

20

30

40

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 element shows highest oxidation state among these

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Zn

Fe

Mn

Sc

The transition elements which are present in 4th period of periodic table have atomic number.

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22 to 30

21 to 30

21 to 29

21 to 31

The type of hybridization in PCl3 is.

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dsp2

sp3

dsp3

d2sp3

Which of the following is non-typical transition element

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Cr

Mn

Zn

Fel

The colour of transition metal complexes is due to

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d-d transition of electrons

Paramagnetic nature of transition elements

Ionization

Loss of s -electrons

Group VI-B of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Which furnace is used to prepared steel

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Blast furnace

Pudding furnace

Bessemer converter

Pyrite furnace

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

f - block elements are also called.

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Non typical transition elements

Outer transition elements

Inner transition elements

None of true

The substance which is added to remove impurities is known as

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Slag

Flux

Ore

Gangue

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

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