Ncert Exercises & Solutions

Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because

1. It has variable ionisation enthalpy

2. It has a tendency to attain noble gas configuration

3. It has a tendency to attain $f^{0}$ configuration

4. It resembles $P b^{4 +}$

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Electronic configuration of

{}_{58}C e = {}_{54}{[X e]} 4 f^{2} 5 d^{0} 6 s^{2}

Therefore, electronic configuration of

C e^{4 +} = {}_{54}{[X e]} 4 f^{0}

Thus, it has tendency to attain noble gas configuration and attain

f^{0}

configuration.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions