MCQ
The maximum number of electrons accommodated in $5f$ orbitals are
- A$5$
- B$10$
- ✓$14$
- D$18$
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[Given : $p K _{ a 1}$ and $p K _{ a 2}$ of $H _2 CO _3$ are $6.37$ and $10.32 $, respectively $; \log 2=0.30$ ]

