Chemistry

$2KMn{O}_4\stackrel{\Delta }{\to }\underset{\left(green\right)}{\overset{+6}{K_{2}Mn{O}_4}}+\underset{\left(black\right)}{Mn{O}_2}+O_2$

Mn⁶⁺ has one unpaired electron so paramagnetic and has green colour.

MCl₃.2L => octahedral complex

$MC{l}_3.2L\stackrel{AgN{O}_3\left(excess\right)}{\to }1moleofAgCl$

It means one Cl^- ion present in ionization sphere.

$\therefore \left[MC{l}_2{L}_2\right]Cl$

For octahedral complex co-ordination numbers is 6

$\therefore L$ is bidentate ligand i.e. its denticity is 2.

Liquation is applicable for the refining of low melting point metals.

In liquation low melting point metal, melt at first and impurities take more time for melting therefore we can separate metal from their impurities.

FeCl₃ + K₄ [Fe (CN)₆] (Potassium ferrocyanide)

excess

|

K Fe [Fe (CN)₆]

(colloidal species)

Prussian Blue coloured 

colloidal complex

(1) $N{a}^2{O}_2+2H_{2}O\to 2NaOH+H_2{O}_2$  

(2)  $Ba{O}_2.8H_{2}Ogives{H}_2{O}_2$ after evaporation

(3) PbO₂ + 2H₂O ->Pb (OH)₄

(4) SnO₂ + 2H₂O ->Sn (OH)₄

MnO -> Antiferromagnetism

O₂ -> Paramagnetism

NaCl -> Diamagnetism

Fe₃O₄ -> Ferrimagnetism

Tyndall effect is more effectively shown by lyophobic colloidal solution.

Type of back bonding:-

Therefore order of back bonding strength =>

BF₃ > BCl₃ > BBr₃ > Bl₃

The intermolecular association which is H-bonding is more prominent in case of primary amine as compared to secondary amines due to the availability of two hydrogen atom