Question # 1

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

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2^-

4

1

6

Turnbull's blue is a compound called?

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Ferricyanide

Ferrous ferricyanide

Ferrous cyanide

Ferri - Ferro cyanide

CuSO₄. 5H₂O is used to prepare

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Transition complex

Fehling's 'A' sol

Fehling's 'B' sol

Fehling's sol

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

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

Which of the following metal exhibits more than one oxidation?

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Na

Mg

Fe

Al

Oxalic acid oxidizes to:

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CO

CO₂

Oxalates

None of these

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

Which is used to identify Cu²⁺ions

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Nitric acid

Sulfuric acid

NaOH

HCI

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

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

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AgCI

AgI

AgBr

NaNO₃

German silver does not contain

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Cu

Zn

Ni

Mn

Potassium chromate has formula

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KClO₃

K₂CO₃

K₂CrO₄

K₂Cr₂O₇

Which one of the following has highest density

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Zn

Os

Ni

Cu

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]

Transition elements differ from s and p block elements due to their characteristic properties. What is not he characteristic property of transition elements

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Transition elements show variable oxidation states

Their salts are coloured

They can be used as catalyst

All of them are metals

Misch mental is

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An alloy of Aluminium

A mixture of chromium and lead chromate

An alloy of lanthanoid metals

An alloy of copper

Which period starts from ₁₁Sc to ₃₀Zn ?

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First Period

Second Period

Third Period

4th Period

Titanium is used as a catalyst in

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Hydrogenation

Dehydrogenation

Polymerization of P.E.

Oxidation of ammonia

Across the lanthanide series, the basicity of the lanthanide hydroxides

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Increases

Decreases

First increases and then decreases

First decreases and then increases

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

The iron obtained from blast furnace is

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Pig iron

Wrought ion

Soft ion

Steel

Sodium thisoulophate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

What is wrong about transition metals?

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Diamagnetic

Paramagnetic

Form complexes

Shows variable oxidation state

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

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I

II

III

IV

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

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24

23

22

21

Rusting can be avoided by :

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Making alloys

Tin or Zinc plating

Use of enamel

All of these

What are alloys

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A homogenous mixture of two or more elements

A homohenous mixture of metal and a non-metal

A homogenous mixture of two or more metals

None of the above

Transition metals mostly are

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Diamagnetic

Paramagnetic

Neither diamagnetic nor paramagnetic

Both diamagnetic and paramagnetic

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

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