d and f-Block Elements Test

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d and f-Block Elements Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

In the dichromate dianion:

A
4Cr-O bonds are equivalent

B
6Cr-O bonds are equivalent

C
All Cr-O bonds are equivalent

D
All Cr-O bonds are non equivalent
Question 2
1 / -0

The catalytic activity of transition elements and their compounds is ascribed to:

A
their chemical reactivity

B
their magnetic behaviour

C
their unfilled d-orbitals

D
their ability to adopt multiple oxidation states and their complexing ability
Question 3
1 / -0

The basic character of the transition metal monoxides follows the order (Atomic no Ti

= 22, V = 23,

Cr = 24, Fe = 26):

A
CrO > VO > FeO > TiO

B
TiO > FeO > VO > CrO

C
TiO > VO > CrO > FeO

D
VO > CrO > TiO > FeO
Question 4
1 / -0

CrO₃dissolves in aqueou s NaOH to give :

A
Iron and dil. H₂SO₄

B
Iron and steam

C
Copper and HCl(g)

D
Sodium and ethyl alcohol
Question 5
1 / -0

Addition of high proportions of manganese makes steel useful in making rails of rail roads, because manganese

A
Gives hardness to steel

B
Helps the formation of oxides of iron

C
sulphur

D
Can show highest oxidation state of +7
Question 6
1 / -0

The anodic mud obtained during electro refining of Cu contains

A
Ag

B
Fe

C
Co

D
Zn
Question 7
1 / -0

Zn

A
Distillation

B
Heating with conc. NaOH

C
Treatment with dil. HNO₃

D
Fractional crystallisation

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d and f-Block Elements Test - 2

Result

d and f-Block Elements Test - 2

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Question 1

4Cr-O bonds are equivalent

6Cr-O bonds are equivalent

All Cr-O bonds are equivalent

All Cr-O bonds are non equivalent

Question 2

their chemical reactivity

their magnetic behaviour

their unfilled d-orbitals

their ability to adopt multiple oxidation states and their complexing ability

Question 3

CrO > VO > FeO > TiO

TiO > FeO > VO > CrO

TiO > VO > CrO > FeO

VO > CrO > TiO > FeO

Question 4

Iron and dil. H2SO4

Iron and steam

Copper and HCl(g)

Sodium and ethyl alcohol

Question 5

Gives hardness to steel

Helps the formation of oxides of iron

sulphur

Can show highest oxidation state of +7

Question 6

Ag

Fe

Co

Zn

Question 7

Distillation

Heating with conc. NaOH

Treatment with dil. HNO3

Fractional crystallisation

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Iron and dil. H₂SO₄

Treatment with dil. HNO₃