Question # 1

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Which element belong to 5d series

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V

Nb

Pd

Hf

Which of the following is not correct about transition metals?

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Their melting and boiling points are high

Their compounds are generally coloured

They can form ionic or covalent compounds

They do not exhibit variable valency

In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

Which one of the following metal ions is colourless?

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V²⁺

Cr³⁺

Zn²⁺

Ti³⁺

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

The total number of inner transition elements in the periodic table is

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10

14

28

30

The free spaces between the metal atoms and its crystal lattice are called

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Valance spaces

Empty spaces

Interstices

None

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

Solubility of KMnO₄at higher temperature is:

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5%

7%

15%

25%

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

Among the lanthandes the one obtained by synthetic method is

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Lu

Pm

Pr

Gd

In physical and chemical properties, transition elements show

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Similarities

Dissimilarities

Both of these

Somestimes similarities, sometimes dissimilarities

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 rion

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

Which period starts from ₁₁Sc to ₃₀Zn ?

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First Period

Second Period

Third Period

4th Period

Which is not a bidentate ligand

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Which is non typical transition element :

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Ni

Co

Y

Fe

[Co(NH₃)₆]³⁺will form ______ structure

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Square planar

Tetrahedral

Octahedral

Trigonal bipyamidal

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

Sodium thisoulophate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

An element in +3 oxidation state has the electronic configuration (Ar) 3d³. Its atomic number is

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24

23

22

21

The total number of d-bock transition element is

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10

14

40

30

Potassium ferrocyanide is a

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Mixed salt

Double salt

Complex salt

Normal salt

The coordination number of iron in [Fe(H₂O)₆]³⁺is

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2

3

4

6

Non-formation of menisus by Hg in presence of O₃is due to the formation of

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Mercuric oxide

Mercurous oxide

Mercuric chloride

Mercurous chloride

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

High purity copper metal is obtained by

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Carbon reduction

Hydrogen reduction

Electrolytic reduction

Thermite reduction

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

Corrosion of iron can be prevented by coating the surface with

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Zn

Sn

Ni

Any of the above

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