Question # 1

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Bessemer converter is used in the manufacture of

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Pig iron

Steel

Wrought iron

Cast iron

Stainless steel contains Cr upto

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12%

18%

10%

5%

An element in +3 oxidation state has the electronic configuration (Ar) 3d³. Its atomic number is

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24

23

22

21

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

Which is non typical transition element :

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Ni

Co

Y

Fe

Oxalic acid oxidizes to:

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CO

CO₂

Oxalates

None of these

How many mole of acidfied FeSO₄solution can be completely oxidized by one mole of KMNO₄?

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10

5

6

2

Which of the following is a carbonate are?

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Pyrolusite

Malchite

Diaspore

cassiterite

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

The total number of d-bock transition element is

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10

14

40

30

Choose the correct answer of transition elements?

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Transition elements have low melting points

Transition elements do not have catalytic activity

Transition elements exhibit variable oxidation states

Transition elements exhibit inert pair effect

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

High purity copper metal is obtained by

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Carbon reduction

Hydrogen reduction

Electrolytic reduction

Thermite reduction

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 colour of the transition metal compounds is due to

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p-d transition

d-d transition

s-p transition

None of these

Turnbull's blue is a compound called?

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Ferricyanide

Ferrous ferricyanide

Ferrous cyanide

Ferri - Ferro cyanide

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 element belong to 5d series

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V

Nb

Pd

Hf

Potassium ferrocyanide is a

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Mixed salt

Double salt

Complex salt

Normal salt

Which of the following is non-typical transition element?

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Cr

Mn

Zn

Fe

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

Which of the following compounds gives red precipitate with AgNO₃?

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Kl

K₂CrO₄

NaBr

NaNO₃

Cuprous ore among the following is

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Chalcopyites

Azurite

Cuprite

Malachitre

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

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I

II

III

IV

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 formula of curprite is

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Cu₂S

Cus

Cu₂O

CuCO₃

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

The lanthanides contraction is responsible for the fact that

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Zr and Y have about the same radius

Zr and Nb have similar oxidsation state

Zr and Hf have about the same radius

Zr and Zn have the same oxidation satete

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

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