Question # 1

Coordination sphere may be:

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Cationic

Anionic

Neutral

All above

A phtotographic plate is coated with an emulsion of silver nitrate and

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AgCI

AgI

AgBr

NaNO₃

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

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+2

+3

+4

-3

Which is not a bidentate ligand

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What is wrong about transition metals?

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Diamagnetic

Paramagnetic

Form complexes

Shows variable oxidation state

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

Which of the following transition metal ions will have definite value of magnetic moment?

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Se³⁺

Ti³⁺

Cu⁺

Zn²⁺

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

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2^-

4

1

6

The color of Cr³⁺ion is

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Violet

Blue

Pink

Green

Potassium ferrocyanide is a

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Mixed salt

Double salt

Complex salt

Normal salt

Which one of the following has highest density

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Zn

Os

Ni

Cu

Which of the following is a non-typical transition elements

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Cr

Mn

Zn

Fe

Which element does not belong to 3d transition series

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Ti

V

Mn

Te

Which is in differnet phase form other metals

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Ni

Hg

Cd

Na

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

Addition of iron fillings to CuSO₄solution caused precipitation of Cu owing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

Bronze is an alloy of Cu and

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Zn

As

Sb

Sn

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

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

Which element does not belong to 4d series

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Y

Zr

Mo

Zn

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

Transition metals form complexes due to the participation of partially filled

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f-orbitals

d-orbitals

s-orbitals

p-orbitals

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]

The total number of d-bock transition element is

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10

14

40

30

Rusting can be avoided by :

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Making alloys

Tin or Zinc plating

Use of enamel

All of these

Most transition elements show

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Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

Sodium thisoulophate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

Group VIB of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Platinum (IV) chloride combines with ammonia to form compounds in which the coordination number of the platinum is 6. A formula unit on one of the compound contains a cation and only two chloride ions. What is the formula of this compound

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Pt(NH₃)₆CI₄

Pt(NH₃)₅CI₄

Pt(NH₃)₄CI₄

Pt(NH₃)₃CI₄

6-d series is in the period :

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4th

5th

6th

7th

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