Question # 1

d-block elements are also called :

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alkali metal

Alkaline earth metals

Transition elements

Electron deficient elements

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

Which of the following is not an element?

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Graphite

Diamond

22-Carat gold

Rhombic sulphur

AgCl is soluble is

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Aqua regia

H₂SO₄

HCl

NH₃

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

The amount of Ni in stainless steel is

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3%

4%

5%

8%

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

The compound which gives oxygen on moderate heating is

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Zinc oxide

Mercuric oxide

Aluminium oxide

Ferric oxide

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

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German silver

Gun metal

Bell metal

Brass

Among the lanthandes the one obtained by synthetic method is

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Lu

Pm

Pr

Gd

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

Stainless steel contains Cr upto

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12%

18%

10%

5%

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

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

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Square planar

Tetrahedral

Octahedral

Trigonal bipyamidal

What is the name of the comlex [Ni(CO)₄]

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

The number of unpaired electrons in ferrous ion ( Z - 26) is

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3

2

4

5

d-block elements closely resemble in their physical and chemical properties. Which statement is incorrect

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They show variable valency

Their ions and compounds are coloured

They are good conductors of heat and electricity

Their compounds are diamagnetic

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

Which of the following is a typical transition metal?

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Sc

Y

Ra

Co

6-d series is in the period :

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4th

5th

6th

7th

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 transition metal ions will have definite value of magnetic moment?

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Se³⁺

Ti³⁺

Cu⁺

Zn²⁺

Which of the following is a non-typical transition elements

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Cr

Mn

Zn

Fe

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

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Which one of the following metal ions is colourless?

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V²⁺

Cr³⁺

Zn²⁺

Ti³⁺

Steel may be manufacture by two processes which two are correct

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Open hearth process and besemer process

Open hearth process and Haber process

Bassemer process and Haber process

Contact process and Haber process

In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

Which is not a bidentate ligand

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Transition elements form which type of bond

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Ionic bonds only

Covalent bonds only

Ionic and covalent bonds

Polar bonds

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