HARD

Earn 100

Zirconium ( $Zr$ , Atomic number $40$ ) and Hafnium ( $Hf$ , Atomic number $72$ ) are transition series metals of group $4$ . They are found together in nature and are difficult to separate from each other.

Which of the following is the reason for the above?

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Important Questions on The d- and f-Block Elements

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Lanthanoid contraction is observed in:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

The lanthanoid contraction is due to

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What is lanthanoid contraction?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Explain why Zr and Hf exhibit similar properties.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What are the different oxidation states exhibited by lanthanoids?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What is lanthanide contraction? What are its causes?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Which of the following pairs has the same size?

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What is lanthanide contraction? Write any two of its consequences.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii? (Number in the parenthesis are atomic numbers).

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Reason of lanthanoid contraction is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What is lanthanide contraction? Why actinide contraction is greater from element to element that lanthanide contraction ?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Why europium

(II)

is more stable than Cerium

(II)

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Why is

La {(OH)}_{3}

more basic than

Lu {(OH)}_{3}

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Zr (Z = 40)

and

Hf (Z = 72)

have similar atomic and ionic radii because of:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

What is lanthanoid contraction? Give its causes.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Give reasons for the following: There is a steady decrease in atomic or ionic radii of lanthanides from lanthanum to lutetium.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Why do

Zr

and

Hf

have similar properties ?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

The atomic radius of

A g

is closest to

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

Write down the electronic configuration of

{Pm}^{3 +}

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>The Lanthanoids

The pair that has similar atomic radii is:

Zirconium (Zr, Atomic number 40) and Hafnium (Hf, Atomic number 72) are transition series metals of group 4. They are found together in nature and are difficult to separate from each other. Which of the following is the reason for the above?

Important Questions on The d- and f-Block Elements

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Zirconium ( $Zr$ , Atomic number $40$ ) and Hafnium ( $Hf$ , Atomic number $72$ ) are transition series metals of group $4$ . They are found together in nature and are difficult to separate from each other.

Which of the following is the reason for the above?