STD 12 -8.1. Aldehydes and ketones — JEE STD 11 Science — Question

Statement $(I)$ : Aqueous solution of ammonium carbonate is basic.

Statement $(II)$ : Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on $\mathrm{K}_{\mathrm{a}}$ and $K_b$ value of acid and the base forming it.In the light of the above statements, choose the most appropriate answer from the options given below :

(Consider heat capacity of all solutions as $4.2 J g ^{-1} K ^{-1}$ and density of all solutions as $1.0 \ g mL ^{-1}$ )

$1.$ Enthalpy of dissociation (in $kJ mol ^{-1}$ ) of acetic acid obtained from the Expt. $2$ is

$(A)$ $1.0$ $(B)$ $10.0$ $(C)$ $24.5$ $(D)$ $51.4$

$2.$ The $pH$ of the solution after Expt. $2$ is

$(A)$ $2.8$ $(B)$ $4.7$ $(C)$ $5.0$ $(D)$ $7.0$

Give the answer question $1$ and $2.$

$Ag\left( s \right)/A{g^ \oplus }||C{u^{2 + }}/Cu\left( s \right)$

$A{g^ \oplus } + {e^ - } \to Ag\,;\,{E^o} = x$

$C{u^{2 + }} + 2{e^ - } \to Cu\,;\,{E^o} = y$

$E^o_{cell}$ is

Reason: Due to formation of a complex