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ECAT Chemistry Chapter 17 Transition Elements Online Test MCQs With Answers

Question # 1

The number of unpaired electrons in Fe³⁺(Z = 26) are

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Question # 2

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

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Question # 3

In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is

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Zero

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Question # 4

Coordination sphere may be:

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Cationic

Anionic

Neutral

All above

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Question # 5

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

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Question # 6

The total number of rare earth elements is

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Question # 7

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

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AgCI

AgI

AgBr

NaNO₃

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Question # 8

Which element has 4 unpaired electrons in 3d-orbital

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Chromium - 24

Manganese - 25

Iron - 26

Cobalt - 27

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Question # 9

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

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Question # 10

Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?

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[Pt(NH₃)₄(NO₂)]SO₄

[PtNO₂Cl(NH₃)₄]SO₄

[PtCl(NO₂)(NH₃)₄]SO₄

[Pt(NH₃)₄(NO₂)Cl]SO₄

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Question # 11

5-d series is in the period :

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4th

5th

6th

7th

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