- APhenol is less acidic than ethyl alcohol
- ✓Phenol is more acidic than ethyl alcohol
- CPhenol is more acidic than carboxylic acid
- DPhenol is more acidic than carbonic acid
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$2 C ( s )+ H _2( g ) \longrightarrow C _2 H _2( g ) \ \ \ \ \ \Delta H =225 \ kJ mol ^{-1} $
$2 C ( s ) \longrightarrow 2 C ( g )\ \ \ \ \ \ \Delta H =1410 \ kJ mol ^{-1} $
$H _2( g ) \longrightarrow 2 H ( g ) \ \ \ \ \ \ \Delta H =330 \ kJ mol ^{-1}$
$(a)\;\;60\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+40 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}$
$(b)\;\;55\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+45 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}$
$(c)\;\;75\; \mathrm{mL} \frac{\mathrm{M}}{5}\; \mathrm{HCl}+25 \;\mathrm{mL} \frac{\mathrm{M}}{5} \;\mathrm{NaOH}$
$(d)\;\;100\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+100 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}$
$pH$ of which one of them will be equal to $1$ ?
[nearest integer]
(Given: atomic mass of $N =14\, g \,mol ^{-1}$ and of $O$ $=16\, g\, mol ^{-1}$.
Molar heat capacity of $N _{2} O$ is $100\, JK ^{-1}\, mol ^{-1}$ )