MCQ
Which of the following element has maximum density
- A$Hg$
- B$Au$
- ✓$Os$
- D$Pb$
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$\frac{1}{2}\,{N_2}(g)\,\, + \,\,\frac{3}{2}{H_2}(g)\, \to \,N{H_3}(g)$ ......$kJ/mol$
