MCQ
Hydrogen atoms are held together to form hydrogen molecules by
- AHydrogen bond
- BIonic bond
- ✓Covalent bond
- DDative bond
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$\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_5,\left[\mathrm{PtCl}_4\right]^{2-}, \mathrm{BF}_3, \mathrm{Fe}(\mathrm{CO})_5$