Question # 1

Coordination number of Pt in [PtCl (NO²) (NH³)⁴]^2-

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2^-

4

1

6

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

Bessemer converter is used in the manufacture of

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Pig iron

Steel

Wrought iron

Cast iron

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

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2

3

4

6

The colour of transition metal complexes is due to:

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d-d transitions of electorns

Paramagnetic nature of transition

Ionization

Loss of s-electrons

Turnbull's blue is a compound called?

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Ferricyanide

Ferrous ferricyanide

Ferrous cyanide

Ferri - Ferro cyanide

The total number of rare earth elements is

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8

32

14

10

Which alloy contains 50% copper, 25% zinc and 25% nickel

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German silver

Gun metal

Bell metal

Brass

CuSO₄. 5H₂O is used to prepare

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Transition complex

Fehling's 'A' sol

Fehling's 'B' sol

Fehling's sol

Oxalic acid oxidizes to:

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CO

CO₂

Oxalates

None of these

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

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+2

+3

+4

-3

4-d series is in the period:

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4th

5th

6th

7th

The protection of steel by chrome plating is due to

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Cathodic protection

Anodic protection

Covering of steel surface

Formation of alloy with iron

Which element does not belong to 4d series

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Y

Zr

Mo

Zn

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

The colour of a transition metal complex is due to d-d transition The colour of the complex is the complementary of the colour absorbed. Thus [Ti(H₂O₆]³⁺abosrbs yellow light and transmits blue and red colours therefore the solution of titanium complex appears

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Blue

Red

Yellow

Mixture of blue and red or violet

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

Which of the following compounds gives red precipitate with AgNO₃?

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Kl

K₂CrO₄

NaBr

NaNO₃

Out of 110 known elements, transition elements are

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40

60

50

80

Property of transition element is :

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Low m.p and b.p

Parramagnetism

Oxidation state

Low binding energies

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

Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?

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[Pt(NH₃)₄(NO₂)]SO₄

[PtNO₂Cl(NH₃)₄]SO₄

[PtCl(NO₂)(NH₃)₄]SO₄

[Pt(NH₃)₄(NO₂)Cl]SO₄

Which of the following is non-typical transition element?

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Cr

Mn

Zn

Fe

Coordination number of Pt in [Pt Cl(NO₂) (NH₃)]^2-is

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2-

4

1

6

Which one of the following metal ions is colourless?

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V²⁺

Cr³⁺

Zn²⁺

Ti³⁺

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

d-block elements are also called :

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alkali metal

Alkaline earth metals

Transition elements

Electron deficient elements

The oxidation number of Ni in [Ni(CO)₄] is

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+1

0

+4

-4

Which of the following has the maximum number of unpaired d-electrons?

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Zn

Fe²⁺

Ni³⁺

Cu⁺

Bell metal is an alloy of

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Cu, Zn, and Sn

Cu, Zn and Ni

Cu and Zn

Cu and Sn

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