MCQ
Diamagnetic Lanthanoid ions are:
- A$\mathrm{Nd}^{3+}$ and $\mathrm{Eu}^{3+}$
- ✓$\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$
- C$\mathrm{Nd}^{3+}$ and $\mathrm{Ce}^{4+}$
- D$\mathrm{Lu}^{3+}$ and $\mathrm{Eu}^{3+}$
✓
Answer
Correct option: B.
$\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$
b
$\mathrm{Ce}:[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{Ce}^{4+}$ diamagnetic
$\mathrm{Ce}:[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{Ce}^{4+}$ diamagnetic
$\mathrm{La}:[\mathrm{Xe}] 4 \mathrm{f}^0 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{La}^{3+}$ diamagnetic
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which element is named after the name of a planet is ?
Invertase brings about the conversion of
Which of the following is not a fatty acid
Which of the following is not considered as an organometallic compound?
$Image$ The reduction reaction known as:
→Which compound can exist in a dipolar (zwitter ion) state
Which compound undergoes nucleophilic substitution with $NaCN$ at the fastest rate ?
→The oxidation states of $'P'$ in $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}, \mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}$, respectively, are:
→Nitrogen dioxide is dissolved in water to produce
Given below are two statements: One is labelled as $A$ssertion $A$ and the other is labelled as $R$eason $R$:
→Assertion $A$: $\mathrm{pK}_{\mathrm{a}}$ value of phenol is $10.0$ while that of ethanol is $15.9$.
Reason $R$: Ethanol is stronger acid than phenol.In the light of the above statements, choose the correct answer from the options given below: