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Which of the following is not a consequence of lanthanide contraction?
- a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pm
- b)As the size of the lanthanide ions decreases the basic strength increases
- c)The basic character of oxides and hydroxides decreases with increase in atomic number
- d)The atomic radii of 4d and 5d series is similar
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is not a consequence of lanthanide contraction?...
Explanation:
Lanthanide contraction is a phenomenon in which there is a gradual decrease in the size of the lanthanide ions as we move from La to Lu. This phenomenon is caused due to the ineffective shielding of the 4f electrons by the 5s and 5p electrons. The 4f electrons are pulled closer to the nucleus due to the increasing nuclear charge resulting in the contraction of the 4f orbitals. The consequences of the lanthanide contraction are:
a) Change in ionic radii: As we move from La to Lu, the ionic radii of the lanthanide ions decrease gradually from 106 pm to 85 pm.
b) Change in the size of 4d and 5d elements: Due to the lanthanide contraction, the size of 4d and 5d elements becomes almost similar.
c) Decrease in the basic character of oxides and hydroxides: Due to the lanthanide contraction, the size of the lanthanide ions decreases resulting in a decrease in the basic character of oxides and hydroxides.
d) No effect on the basic strength: The basic strength of the lanthanide ions increases with the decrease in size due to the lanthanide contraction.
Therefore, option B is not a consequence of lanthanide contraction. As we move from La to Lu, the size of the lanthanide ions decreases resulting in an increase in the effective nuclear charge. This results in a decrease in the basic strength of the lanthanide ions.
Lanthanide contraction is a phenomenon in which there is a gradual decrease in the size of the lanthanide ions as we move from La to Lu. This phenomenon is caused due to the ineffective shielding of the 4f electrons by the 5s and 5p electrons. The 4f electrons are pulled closer to the nucleus due to the increasing nuclear charge resulting in the contraction of the 4f orbitals. The consequences of the lanthanide contraction are:
a) Change in ionic radii: As we move from La to Lu, the ionic radii of the lanthanide ions decrease gradually from 106 pm to 85 pm.
b) Change in the size of 4d and 5d elements: Due to the lanthanide contraction, the size of 4d and 5d elements becomes almost similar.
c) Decrease in the basic character of oxides and hydroxides: Due to the lanthanide contraction, the size of the lanthanide ions decreases resulting in a decrease in the basic character of oxides and hydroxides.
d) No effect on the basic strength: The basic strength of the lanthanide ions increases with the decrease in size due to the lanthanide contraction.
Therefore, option B is not a consequence of lanthanide contraction. As we move from La to Lu, the size of the lanthanide ions decreases resulting in an increase in the effective nuclear charge. This results in a decrease in the basic strength of the lanthanide ions.
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Which of the following is not a consequence of lanthanide contraction?...
The small average decreases in the atomic size is responsible for a small decrease in electronegativity and S.O.P of lanthanides. As the size of the lanthanide ions decreases the covalent character of M—OH bond increases and hence basic strength decreases.
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Which of the following is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer?
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Which of the following is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 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 is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer?.
Which of the following is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 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 is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not a consequence of lanthanide contraction?a)From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pmb)As the size of the lanthanide ions decreases the basic strength increasesc)The basic character of oxides and hydroxides decreases with increase in atomic numberd)The atomic radii of 4d and 5d series is similarCorrect answer is option 'B'. Can you explain this answer?.
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