Question # 1

d-d transition cannot be observed in

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Cr

Cu

Mn

Zn

Catalyst used for ammonia synthesis is

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Cu

Co

Zn

Fe

At which oxidation state Cu achieves electronic configuration of Zn+2

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0

+2

+1

+3

Zn has

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Zero unpaired electrons

Three unpaired electrons

Five unpaired electrons

One paired electrons

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

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Cr+3

Ni+2

Co+2

Fe+3

What is the sequence of electron take up and removal from 4s orbital a transition metal in 3d series?

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Enters first, leaves after 3d electrons removal

Enters after 3d electrons, leaves after 3d electrons

Enters after 3d eleetrons, leaves first

Enters first and leaves first

d-d transition cannot be shows by

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Cu+1

Sc+3

Zn+2

All

In [Ti (H2O)]3+ which colour is transmitted

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Yellow

Blue and red

Blue and yellow

red and yellow

Which pair of transition elements shows abnormal electronic configuration?

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Sc and Zn

Cu and Sc

Zn and Cu

Cu and Cr

Which of the elements has seven electrons in d-subshell?

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Zn

Co

Cu

Fe

Transition compounds which occur as tripositive ions have no

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4s-electron

3p-electron

3s-electron

2s-electron

Which of the folowing compound is expected to be colored

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Na2SO4

ZnCl2

MgF₂

CuF₂

Ti+3 shows minimum absorption (maximum transmittance) at-------and-------wavelength

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Yellow, Green

Red. Yellow

Blue. Green

Red. Blue

The energy difference of d-orbitals varies from

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Atom to atom

lon to ion

Electron to electron

proton to proton

Which of the following pair has the same no. of electrons in d- subshell

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Sc+3,Ti+3

Mn+2,Fe+3

Ti+3,V+3

Cr+3.Co+2

The total number of 3d-series transition elements is

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10

40

14

58

The element which shows highest binding energy

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V

T

So

Cr

Number of electrons involved in d-d transition of [Ti(H2O)6]+3

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1

3

2

4

Highest oxidation state af the transition elements is

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+8

+7

+5

+1

A transition element X has a configuration [Ar) 4s3dd in its +3 oxidation state. Its atomic number is

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25

26

22

19

The highest oxidation state of manganese is

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+7

-7

+6

+4

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