Solution: 

Dissociation in chemistry and biochemistry is a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into smaller particles such as atoms, ions or radicals, usually in a reversible manner. It may or may not form charged species as shown below. 

i). NaCl ? Na⁺ + Cl⁻

ii). N₂O₄ ?2NO₂

Solution

Since potassium gives violet colour on the flame test, the substance X is KCl. 

SOLUTION

Solution

Acetaldehyde

Solution

Let $$1$$ $$g$$ of both $$A$$ and $$B$$ are taken initially. $${ W }_{ A }$$ and $${ W }_{ B }$$ are the amounts left after $$20$$ days.
$${ \lambda  }_{ A }=\dfrac { 2.303 }{ 20 } \log { \dfrac { 1 }{ { W }_{ A } }  } $$
$${ \lambda  }_{ B }=\dfrac { 2.303 }{ 20 } \log { \dfrac { 1 }{ { W }_{ B } }  } $$
$${ \lambda  }_{ A }-{ \lambda  }_{ B }=\dfrac { 2.303 }{ 20 } \log { \dfrac { { W }_{ B } }{ { W }_{ A } }  } $$
               $$=\dfrac { 2.303 }{ 20 } \log { 4 } =0.0693$$
$${ \lambda  }_{ B }={ \lambda  }_{ A }-0.0693=\dfrac { 0.693 }{ { t }_{ { 1 }/{ 2 } } } -0.0693$$
               $$=\dfrac { 0.693 }{ 1 } -0.0693=0.6237$$
$${ t }_{ { 1 }/{ 2 } }B=\dfrac { 0.693 }{ 0.6237 } =1.11$$ day

Solution

Galena (PbS) are sulphide ores. Cassiterite SnO₂ (oxide ore), and Magnetite Fe₃O₄ (oxide ore) are not sulphide ore. The froth flotation process is used to concentrate sulphide ores, based on preferential wetting properties with frosting agent and water.

SOLUTION

Among the various types of gas chromatography, gas-liquid chromatography is the method most commonly used to separate organic compounds. 

It follows the principle of partition. It can be used for compounds which vaporize without decomposition.

SOLUTION

SOLUTION

The most stable free radical is C₆H₅CHCH₃ because of resonance.