MCQ
The law formulated by Dr. Nernst is
- AFirst law of thermodynamics
- BSecond law of thermodynamics
- ✓Third law of thermodynamics
- DBoth $ (a)$ and $(b)$
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$C{H_4}(g) + 2{O_2}(g) \to C{O_2}(g) + 2{H_2}O(l)$ ;
${\Delta _r}{H_{300}} = - 212.7\ Kcal / mol$ .
The absolute value of ${\Delta _r}U_{300}^o$ for this reaction is .......$Kcal\,/\,mol$ $(R = 2\ cal/mol-K)$
Assertion $A :$ The amphoteric nature of water is explained by using Lewis acid/base concept.
Reason $R$ : Water acts as an acid with $NH _{3}$ and as a base with $H _{2} S$.
In the light of the above statements choose the correct answer from the options given below :
(Molar mass of $Na_2CO_3 = 106\ g\ mol^{-1} )$
