MCQ
Identify conformer of $2-$ methyl pentane
- A

- B

- C

- ✓







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$H_2O(l) \rightarrow H^+(aq) + OH^-(aq)\,;\,\,\Delta H = 57.32\,kJ$
$H_2(g)+ \frac{1}{2} O_2(g) \rightarrow H_2O(l)\,;\,\, \Delta H=-286.20\,kJ$
The value of enthalpy of formation of $OH^-$ ion at $25\,^oC$ is : .............. $\mathrm{kJ}$
$'A'$ on reaction with sodium hypoiodite gives $'B',$ which on further heating with soda lime gives ' $C$ '. The compound ' $C$ ' is $....... .$
$(I) \,S _{2} O _{4}^{2-}$
$(I I)\, S _{2} O _{5}^{2-}$
$(III) \,S _{2} O _{6}^{2-}$