STD 11 - 2. structure of atom — NEET STD 11 Science — Question

$6 \mathrm{OH}^{-}+\mathrm{Cl}^{-} \rightarrow \mathrm{ClO}_{3}^{-}+3 \mathrm{H}_{2} \mathrm{O}+6 \mathrm{e}^{-}$

A current of $x A$ has to be passed for $10 h$ to produce $10.0 \mathrm{~g}$ of potassium chlorate. The value of $\mathrm{x}$ is $.......$ (Nearest integer)

(Molar mass of $\left.\mathrm{KClO}_{3}=122.6 \mathrm{~g} \mathrm{~mol}^{-1}, \mathrm{~F}=96500 \mathrm{C}\right)$

$(A)$ the reaction of $Al _2 O _3$ with coke ($C$) at a temperature $>2500^{\circ} C$.

$(B)$ the neutralization of aluminate solution by passing $CO _2$ gas to precipitate hydrated alumina $\left( Al _2 O _3 .3 H _2 O \right)$

$(C)$ the dissolution of $Al _2 O _3$ in hot aqueous $NaOH$.

$(D)$ the electrolysis of $Al _2 O _3$ mixed with $Na _3 AlF _6$ to give $Al$ and $CO _2$.

$(a)$ $\begin{array}{*{20}{c}}
  {C{H_3} - CH - Br} \\ 
  {|\,\,} \\ 
  {\,\,\,\,\,{C_2}{H_5}\,} 
\end{array}$          $(b)$ $\begin{array}{*{20}{c}}
  {\,\,Br\,} \\ 
  {|\,} \\ 
  {C{H_3} - C - C{H_3}} \\ 
  {|\,} \\ 
  {\,\,\,\,\,{C_2}{H_5}} 
\end{array}$          $(c)$ $\begin{array}{*{20}{c}}
  {{C_2}{H_5} - CH - C{H_2}Br} \\ 
  {\,\,|\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {{C_2}{H_5}\,\,} 
\end{array}$

$2{H_2}O \rightleftharpoons {H_3}{O^ + } + O{H^ - }$ , 

the value of $\Delta {G^o}$ at $298\,K$ is approximately .......$kJ\,mol^{-1}$