SATHEE: D-And F-Block Elements Ques 515

D-And F-Block Elements Ques 515

Question: Arrange (I) $C e^{3 +}$ , (II) $L a^{3 +}$ , (III) $P m^{3 +}$ , and (IV) $Y b^{3 +}$ in increasing order of their ionic radii.

Options:

A) IV<III<I<II

B) I<IV<III<II

C) IV<III<II<I

D) III<II<I<IV

Show Answer

Answer:

Correct Answer: A

Solution:

Ionic radii decrease across lanthanide series due to lanthanide contraction. As all ions are in +3 O.S., ionic radii will follow the trend of atomic radii.

$∴ \underset{(Z = 57)}{L a^{3 +}}, > \underset{(Z = 58)}{C e^{3 +}}, > \underset{(Z = 61)}{P m^{3 +}}, > \underset{(Z = 70)}{Y b^{3 +}},$

D-And F-Block Elements Ques 515

Question: Arrange (I) $C e^{3 +}$ , (II) $L a^{3 +}$ , (III) $P m^{3 +}$ , and (IV) $Y b^{3 +}$ in increasing order of their ionic radii.

Options:

Answer:

Solution:

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D-And F-Block Elements Ques 515

Question: Arrange (I) Ce3+ , (II) La3+ , (III) Pm3+ , and (IV) Yb3+ in increasing order of their ionic radii.

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: Arrange (I) $C e^{3 +}$ , (II) $L a^{3 +}$ , (III) $P m^{3 +}$ , and (IV) $Y b^{3 +}$ in increasing order of their ionic radii.