MCQ
Which has maximum vapour pressure
- A$HI$
- B$HBr$
- ✓$HCl$
- D$HF$
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Given : Molar Mass of $Na$, $O$ and $H$ is $23,16$ and $1\,g\,mol ^{-1}$ respectively
($A$) can also be prepared by reaction of $\mathrm{P}_4$ and $\mathrm{HNO}_3$
($B$) is diamagnetic
($C$) contains one $\mathrm{N}-\mathrm{N}$ bond
($D$) reacts with $\mathrm{Na}$ metal producing a brown gas
$C + {O_2} \to C{O_2};\,\Delta H = - 394\,kJ\,mo{l^{ - 1}}$
$2CO + {O_2} \to 2C{O_2};\,\Delta H = - 569\,kJ\,mo{l^{ - 1}}$ The heat of formation of $1\,mol$ of carbon monoxide is thus .....$kJ\,mo{l^{ - 1}}$