MCQ
Which species has the same shape as $NH_3$ ?
- A$SO^{2-}_3$
- B$CO^{2-}_3$
- C$NO^{-}_3$
- D$SO_3$
$(c)\, NO^-_3 \to$ Trigonal planar $(d) \,SO_3 \to$ Trigonal planar
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Ice $ \rightleftharpoons $ Water
$H_2O(l) \rightarrow H^+(aq) + OH^-(aq)\,;\,\,\Delta H = 57.32\,kJ$
$H_2(g)+ \frac{1}{2} O_2(g) \rightarrow H_2O(l)\,;\,\, \Delta H=-286.20\,kJ$
The value of enthalpy of formation of $OH^-$ ion at $25\,^oC$ is : .............. $\mathrm{kJ}$
$NH _{2} CN _{( s )}+\frac{3}{2} O _{2}( g ) \rightarrow N _{2( g )}+ O _{2}( g )+ H _{2} O _{(l)}$
is ............ $kJ$. (Rounded off to the nearest integer)
[Assume ideal gases and $\left. R =8.314\, J\, mol ^{-1} K ^{-1}\right]$
