Chemistry

In extraction of copper from copper pyrite (CuFeS₂).

FeS converted to FeO as;

$\underset{Gangue}{2FeS}+3O_2\stackrel{\Delta }{\to }\underset{Gangue}{2FeO}+2S{O}_2$          

Then FeO is removed as slag by given reaction

FeO + SiO₂ ®   $\underset{Slag}{FeSi{O}_3}$

· Cl₂O₇ being non-metallic oxide is acidic in nature.

· Na₂O being metallic oxide is basic in nature.

· Al₂O₃ is an amphoteric oxide

· N₂O is neutral oxide

Metallic suphides i.e CdS are negatively charged colloidal solution.

Starch colloid is macro molecular colloidal solution.

Fe₂O₃. xH₂O sol is positively charged colloidal solution.

Cheese is an example of gel.

It is aldol condensation.

Number of sp² carbon = 8

Kindly consider the following figure

CoCl₃.NH₃ + AgNO₃   $\stackrel{}{\to }AgC\mathcal{l}\downarrow \left(2mol\right)$

$\left[Co{\left(N{H}_3\right)}_{5}C\mathcal{l}\right]C{\mathcal{l}}_2+AgN{O}_3\stackrel{}{\to }AgC\mathcal{l}\downarrow \left(2mol\right)$            

x = 5

$M{n}^{2+}\stackrel{}{\to }{t}_{2g^{111}}{e_g}^{11}$

(Number of unpaired electron = 5)

${\mu }_S=\sqrt[]{35}=5.91\cong 6$

  $K=A.e^{-Ea/RT}=\left(6.5*10^2\right)e^{-26000K/T}$

$\frac{Ea}{8.314}=26000$

 E_a = 216.164kJ/mol $\cong$ 216

H₂ (g) + Cu²⁺ (aq)   $\stackrel{}{\to }$ 2H⁺ (aq) + Cu (s)

  $\therefore E_{cell}=E_{cell}^0-\frac{2.303RT}{nf}logQ$              

              0.31 = 0.34 -   $\frac{0.06}{2}log\frac{\left[H^{+}\right]}{C{u}^{2+}}$

$\left[C{u}^{2+}\right]=10^{-7}\left(?\left[H^{+}\right]=10^{-3}\right)$        

              x = 7