Question # 1

Which is used to identify Cu²⁺ions

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Nitric acid

Sulfuric acid

NaOH

HCI

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

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 d-block elements can show the highest oxidation number in its compounds

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Chromium

Copper

Nickel

Manganese

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

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

Which of the following is obtained when Fe reacts with dil. HNO₃?

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N₂O

NO

NO₂

None of these

Which of the following compounds gives red precipitate with AgNO₃?

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Kl

K₂CrO₄

NaBr

NaNO₃

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

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

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

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

E.D.T.A is

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Mono-dentate

Bi-dentate

Polydentate

Having three lone pairs of electrons

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Which of the following is used as disinfectant

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K₂Cr₂O₇

KMnO₄

K₂MnO₄

K₂CrO₄

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

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

Corrosion of iron can be prevented by coating the surface with

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Zn

Sn

Ni

Any of the above

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

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

Stainless steel contains ion and carbon along with

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Ni and Cr

Cr and Co

Co and Mn

Mn and Ni

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

Most transition elements show

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Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

The geometry of [Co(NH₃)₆]³⁺is

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Tetrahedral

Square planar

Octahedral

None of these

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⁺

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

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Se³⁺

Ti³⁺

Cu⁺

Zn²⁺

Sodium thisoulophate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

Which of the following is not related to transition metals

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They have a high tensile strength

They are ductile

They are malleable

They have low melting points

Transition metals form complexes due to the participation of partially filled

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f-orbitals

d-orbitals

s-orbitals

p-orbitals

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

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