MCQ
Which element among the Lanthanides has the smallest atomic radius?
- ACerium.
- ✓Lutetium.
- CEuropium.
- DGadolinium.
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Statement $I:$ Primary aliphatic amines react with $HNO _{2}$ to give unstable diazonium salts.
Statement $II:$ Primary aromatic amines react with $HNO _{2}$ to form diazonium salts which are stable even above $300 \,K$.
In the light of the above statements, choose the most appropriate answer from the options given below: