Question # 1

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

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Square planar

Tetrahedral

Octahedral

Trigonal bipyamidal

Series starting from57La,42Hf -80Hg is in the period:

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4th

5th

6th

7th

Maximum variable oxidation state is of:

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Mn⁺²

Fe⁺³

Cr⁺¹

a and b

The total number of transition elements is:

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10

14

40

50

Cuprous ore among the following is

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Chalcopyites

Azurite

Cuprite

Malachitre

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

A transition metal complex can be recognized by various terms. Which is not the proper term

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Central metal ion

Coordination number

Ligand

Geometry of complex

Potassium hexacyanoferrate (II) has the formula

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K₄[Fe(CN)₆]

K₃[Fe(CN)₆]

K₂[Fe(CN)₆]

K [Fe(CN)₆]

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

Which element belong to 5d series

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V

Nb

Pd

Hf

The colour of the transition metal compounds is due to

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p-d transition

d-d transition

s-p transition

None of these

An oxidixing agent

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K₂Cr₂O₇

H₂SO₄

FeSO₄

K₂SO₄

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

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24

23

22

21

Which one of the following has highest density

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Zn

Os

Ni

Cu

The color of Cr³⁺ion is

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Violet

Blue

Pink

Green

Which is the correct electronic configuration of Cr - 24

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1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁴, 4s²

1s², 2s², 2p⁶, 3s², 3p⁶, 3d³, 4s², 4p¹

1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵, 4s¹

1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵, 4p¹

CuSO₄. 5H₂O is used to prepare

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Transition complex

Fehling's 'A' sol

Fehling's 'B' sol

Fehling's sol

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Which element does not belong to 3d transition series

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Ti

V

Mn

Te

Transition elements are called so because:

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Form interstital sompounds

have high m.p

In between 's' and' 'p' block elements

All of these

Group VIB of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Which period starts from ₁₁Sc to ₃₀Zn ?

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First Period

Second Period

Third Period

4th Period

The amount of Ni in stainless steel is

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3%

4%

5%

8%

Property of transition element is :

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Low m.p and b.p

Parramagnetism

Oxidation state

Low binding energies

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 element does not belong to 4d series

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Y

Zr

Mo

Zn

The oxidation state of Fe in [Fe(CN)₆]^3-is

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+2

+3

+4

-3

The lanthanides contraction is responsible for the fact that

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Zr and Y have about the same radius

Zr and Nb have similar oxidsation state

Zr and Hf have about the same radius

Zr and Zn have the same oxidation satete

In the manufacture of iron from haematitie,limestone is added to act as

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Flux

A reducing agent

Slag

An oxidizing agent

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

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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