MCQ
Which molecule does not show zero dipole moment
- A$B{F_3}$
- ✓$N{H_3}$
- C$CC{l_4}$
- D$C{H_4}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.


$H_2O(l) \rightarrow H^+(aq) + OH^-(aq)\,;\,\,\Delta H = 57.32\,kJ$
$H_2(g)+ \frac{1}{2} O_2(g) \rightarrow H_2O(l)\,;\,\, \Delta H=-286.20\,kJ$
The value of enthalpy of formation of $OH^-$ ion at $25\,^oC$ is : .............. $\mathrm{kJ}$