Ncert Solutions Chemistry Class 12th

Statement-I is true, because metal reduced by decreasing $\Delta G$ in Elligham diagram but statement-II is false, Ellingham diagram is $\Delta G$ vs temperature graph has no relation with $\Delta S.$

  $\underset{Chlorocompound}{\underset{?}{A}}\underset{\left(2\right)H_{2}O}{\overset{\left(1\right)O_3}{\to }}Formaldehyde$

$\downarrow$                   

Weight = 1.53 gm

V = 448 ml (STP)

Mole = $\frac{448}{22400}=\frac{weight}{molecularweight}$

$\therefore \frac{1.53}{molecularweight}=\frac{1}{50}$  

$\therefore$ Molecular weight of compound A = 50 * 1.53 = 76.5 gram

Molecular weight 76.5 = C_nH_2n-1 Cl

$\therefore C_n{H}_{2n-1}=41$  

or 12 n + 2n – 1 = 41

Molecular formula = C₃H₅Cl

Number of C- atoms = 3

Kindly consider the following figure

In Frenkel defect, cations are inserted in neighbouring site, therefore statement-I is correct, because vacancy developed by missing cations and interstitial sites are equal. Statement II is false because F-centre developed by metal excess defect due to anion vacancies.

$B{i}_2{S}_3?{\underset{2S}{2Bi}}^{+3}+{\underset{3S}{3S}}^{-2}$

$Ksp={\left(2S\right)}^2{\left(3S\right)}^3=4*27*{\left(S\right)}^5$

= 108 (S)5

${\left(S\right)}^5=\frac{1.08*10^{-73}}{108}=10^{-75}$ $\therefore S=10^{-15}M$

$E_{cell}={\left(E_{RHS}^o-E_{LHS}^o\right)}_{RP}-\frac{0.0591}{n}lo{g}_{10}Q$

$Q=\frac{\left[Z{n}^{++}\right]}{\left[C{u}^{++}\right]}=\frac{0.04}{0.02}andn=2$

$\therefore E_{cell}=\left(0.34+0.76\right)-\frac{0.0591}{2}lo{g}_{10}\frac{0.04}{0.02}$

$=1.1-\frac{0.0591}{2}*0.3010=1.091V=109*10^{-2}V$

Kindly consider the following figure

Cu₂Cl₂ + Water -> Insoluble

AgCl + Water -> Insoluble

ZnCl₂ + Water -> Colouless solution

CuCl₂ + Water -> Coloured solution due to 3d⁹ electronic configuration.

Molar weight of BaSO₄ = 233 gram

233 gm of BaSO₄ has 32 gm of S content

Hence 1.44 gm of BaSO₄ has $\left(\frac{32*1.44}{233}\right)$ g of S content = 0.1977 gm of 'S'

Weight of sulphur = 0.2 gram (the nearest)

Weight of organic sample = 0.471 gram

% of Sulphur = $\frac{0.2*100}{0.471}=42.46\mathrm{\%}$  

the nearest = 42%

Kindly consider the following figure