Question # 1

In the electronic configuration of Cr one electron from 4s sub-shell is transferred to 3d sub-shell because

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The 3d orbital is of lower energy than 4s

The half-filled d-subshell is more stable than 4 electrons having d-subshell

The 4s orbital is of equal energy to 3d orbital

6 unpaired electron make Cr more paramagnetic

Electrons in 5d energy level are filled up in case of

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Lanthanides

Transition metals

Actinides

Rare gases

Which of the following are responsible for the colour developed in transition elements compounds?

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s-orbitals

p-orbitals

d-orbitals

f-orbitals

Paramagnetic behaviour is caused by the presence of

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Unpaired electrons

Paired electrons

Paired protons

Paired electrons in an atom. molecule or ion

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

The maximum oxidation state of Mn is

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+6

+7

+5

+4

The strength of binding energy of transition elements depends upon

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Number of electron pairs

Number of unpaired electrons

Number of neutrons

Number of protons

Which of these has at least one d electron

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Sc+3

Mn+7

Ti+4

Cr+3

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

Highest oxidation state af the transition elements is

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+8

+7

+5

+1

Group VIB of transition elements contains

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Zn. Cd. Hg

Cr. Mo, w

Fe. Ru, Os

Mn. Te. Re

which of the following d blocks element can showthe highest oxidation number is its ompound

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Chromium

iron

Copper

Manganese

Which of the following is a non-typical transition element?

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Cr

Zn

Mn

Fe

d-d transition cannot be observed in

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Cr

Cu

Mn

Zn

The highest oxidation state of manganese is

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+7

-7

+6

+4

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

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Zn

Co

Cu

Fe

Catalyst used for ammonia synthesis is

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Cu

Co

Zn

Fe

All 3d series elements show an oxidation state of oxidation state

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+1

+2

+3

Zero

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

D-block elements are also called

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Non-typical transition element

Outer transition elements

Abnormal transition elements

Inner transition

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