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Which of the following statement is not correct? [2001]
- a)La (OH)3 is less basic than Li(OH)3
- b)La is actually an element of transition series rather lanthanides
- c)Atomic radius of Zr and Hf are same because of lanthanide contraction
- d)In lanthanide series ionic radius of Ln+3 ions decreases
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following statement is not correct? [2001]a)La (OH)3 is l...
La (OH)3 is more basic than Li (OH)3. In lanthanides the basic character of hydroxides decreases as the ionic radius decreases.
Most Upvoted Answer
Which of the following statement is not correct? [2001]a)La (OH)3 is l...
Explanation:
La (OH)3 is less basic than Li(OH)3:
- This statement is not correct because La(OH)3 is actually more basic than Li(OH)3. Lanthanum hydroxide (La(OH)3) is a stronger base compared to lithium hydroxide (Li(OH)3) due to the higher charge and larger size of the lanthanum ion.
La is actually an element of transition series rather than lanthanides:
- This statement is correct. Lanthanum (La) is considered a transition metal rather than a lanthanide element because it has the electronic configuration [Xe] 5d1 6s2, which places it in the transition metal series.
Atomic radius of Zr and Hf are same because of lanthanide contraction:
- This statement is not correct. The similar atomic radii of Zirconium (Zr) and Hafnium (Hf) are due to their position in the periodic table and not the lanthanide contraction phenomenon. Both Zr and Hf are transition metals with similar atomic sizes.
In lanthanide series ionic radius of Ln+3 ions decreases:
- This statement is correct. In the lanthanide series, as you move from left to right, the ionic radius of Ln+3 ions decreases due to increased nuclear charge and greater attraction between the nucleus and the outermost electrons.
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Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer?.
Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is not correct? [2001]a)La (OH)3 is less basic than Li(OH)3b)La is actually an element of transition series rather lanthanidesc)Atomic radius of Zr and Hf are same because of lanthanide contractiond)In lanthanide series ionic radius of Ln+3 ions decreasesCorrect answer is option 'A'. Can you explain this answer?.
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