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In context of the lanthanides, which of the following statements is not correct?
(AIEEE 2011)
- a)There is a gradual decrease in the radii of the members with increasing atomic number in the series
- b)All the members exhibit +3 oxidation state
- c)Because of similar properties, the separation of lanthanoids is not easy
- d)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
In context of the lanthanides, which of the following statements is no...
(a) There is a gradual decrease in the radii of the lanthanoids with increasing atomic number a case of lanthanide contraction, thus true.
(b) Ionisation potential for the formation of Lu3+ is comparatively low, hence +3 state is favourable, thus true,
(c) Due to lanthanoid contraction, Zr and Hf; Nb and Ta,
Mo and W have the same size and thus, similar properties and thus separation is notfwsy, thus true.
(d) Formation of +4 state requires very high energy, thus incorrect.
(b) Ionisation potential for the formation of Lu3+ is comparatively low, hence +3 state is favourable, thus true,
(c) Due to lanthanoid contraction, Zr and Hf; Nb and Ta,
Mo and W have the same size and thus, similar properties and thus separation is notfwsy, thus true.
(d) Formation of +4 state requires very high energy, thus incorrect.
Most Upvoted Answer
In context of the lanthanides, which of the following statements is no...
Explanation:
The lanthanides are a series of 15 elements, starting from lanthanum (La) to lutetium (Lu), in the periodic table. They are also known as the rare earth elements.
Statement a: There is a gradual decrease in the radii of the members with increasing atomic number in the series.
This statement is correct. As we move from lanthanum to lutetium, the atomic radii gradually decrease due to the increase in effective nuclear charge, which attracts the electrons more strongly and reduces the size of the atoms.
Statement b: All the members exhibit 3 oxidation state.
This statement is correct. The lanthanides commonly exhibit a +3 oxidation state because they have three valence electrons in their outermost 5d and 6s orbitals. These electrons are easily lost to form a stable +3 charge.
Statement c: Because of similar properties, the separation of lanthanoids is not easy.
This statement is correct. The lanthanides have similar chemical properties due to the similar electronic configurations of their outermost electrons. The separation of lanthanides is a challenging task due to their close similarities in physical and chemical properties.
Statement d: Availability of 4f electrons results in the formation of compounds in 4 state for all the members of the series.
This statement is incorrect. The availability of 4f electrons does not result in the formation of compounds in the +4 oxidation state for all the lanthanides. While some lanthanides, like cerium (Ce) and praseodymium (Pr), can exhibit a +4 oxidation state, others generally exhibit a +3 oxidation state. The availability of 4f electrons and their involvement in chemical bonding is more complex and can vary depending on the specific element and compound involved.
The lanthanides are a series of 15 elements, starting from lanthanum (La) to lutetium (Lu), in the periodic table. They are also known as the rare earth elements.
Statement a: There is a gradual decrease in the radii of the members with increasing atomic number in the series.
This statement is correct. As we move from lanthanum to lutetium, the atomic radii gradually decrease due to the increase in effective nuclear charge, which attracts the electrons more strongly and reduces the size of the atoms.
Statement b: All the members exhibit 3 oxidation state.
This statement is correct. The lanthanides commonly exhibit a +3 oxidation state because they have three valence electrons in their outermost 5d and 6s orbitals. These electrons are easily lost to form a stable +3 charge.
Statement c: Because of similar properties, the separation of lanthanoids is not easy.
This statement is correct. The lanthanides have similar chemical properties due to the similar electronic configurations of their outermost electrons. The separation of lanthanides is a challenging task due to their close similarities in physical and chemical properties.
Statement d: Availability of 4f electrons results in the formation of compounds in 4 state for all the members of the series.
This statement is incorrect. The availability of 4f electrons does not result in the formation of compounds in the +4 oxidation state for all the lanthanides. While some lanthanides, like cerium (Ce) and praseodymium (Pr), can exhibit a +4 oxidation state, others generally exhibit a +3 oxidation state. The availability of 4f electrons and their involvement in chemical bonding is more complex and can vary depending on the specific element and compound involved.
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In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer?
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In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer?.
In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer?.
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ample number of questions to practice In context of the lanthanides, which of the following statements is not correct?(AIEEE2011)a)There is a gradual decrease in the radii of the members with increasing atomic number in the seriesb)All the members exhibit +3 oxidation statec)Because of similar properties, the separation of lanthanoids is not easyd)Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice JEE tests.
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