Exams › NEET › Chemistry

Reason of lanthanoid contraction is:

1. Negligible screening effect of 'f' orbitals
2. Increasing nuclear charge
3. Decreasing nuclear charge
4. Decreasing screening effect

Correct answer: Increasing nuclear charge

Solution

Lanthanoid contraction occurs due to the increasing nuclear charge across the lanthanoid series, while the poor shielding effect of the 4f orbitals allows the outer electrons to be pulled closer to the nucleus.

Related NEET Chemistry questions

• Identify the incorrect statement.
• Which one of the following ions exhibits d-d transition and paramagnetism as well?
• Magnetic moment 2.84 B.M. is given by: (At. nos, Ni = 28, Ti = 22, Cr = 24, Co = 27)
• Magnetic moment 2.83 B.M is given by which of the following ions? (At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
• KMnO4 can be prepared from K2MnO4 as per the reaction: 3MnO4^2− + 2H2O → 2MnO4^− + MnO2 + 4OH^−. The reaction can go to completion by removing OH^− ions by adding:
• Which of the statements is not true?

⚔️ Practice NEET Chemistry free + battle 1v1 →