(i) Compound 'A' is Ethanoic acid - CH₃COOH [C₂H₄O₂]
Compound 'B' is Ethyl Ethanoate - CH₃COOH₂CH₃
(ii) 
(iii) This reaction is known as Esterification reaction.
Reason: Ethyl ethanoate is an ester.

(i) 
(ii) IUPAC name - Butane-2-ol (or) 2-Butanol.
(iii) The compound is saturated, because these compounds are do not decolourize with bromine water.

Ethanoic acid reacts with metals like Na, K, Zn, etc. to form metal ethanoate and hydrogen gas.
2CH₃COOH + Zn ⟶ (CH₃COO)₂ Zn + H₂ ↑
2CH₃COOH + 2Na ⟶ 2CH₃COONa + H₂O

Ethanol is used
(i) as an anti-freeze in automobile radiators.
(ii) as an antiseptic to sterilize wounds, in hospitals.
(iii) as a solvent for drugs, oils, fats, perfumes, dyes, etc..

When ethanol is heated with are H₂SO₄ at 443K, it loses a water molecule to form ethane.

The nitrogen content of the molasses fortified by the addition of ammonium sulphate or ammonium phosphate.

Aqueous solution of ethanol which contain 95.5% of ethanol and 4.5% of water is called rectified spirit.

(i) Take the given sample solution in a test tube.
(ii) Add a few drops of bromine water and observe any characteristic change in colour
(iii) If the given compound is unsaturated it will decolorise bromine water. Saturated compounds do not decolorise bromine

(i) Dilution: Molasses is first diluted with water to bring down the concentration of sugar to about 8 to 10 percent.
(ii) Addition of yeast: Yeast is added to this solution and the mixture is kept at about 300 K for a few days during this period, the enzymes invertase and zymase present in yeast, bring about the conversion of sucrose into ethanol.

(iii) Distillation of wash: The fermented liquid (i.e. wash), containing 15 to 18 percent alcohol, is now subjected to fractional distillation. The main fraction drawn is an aqueous solution of ethanol which contain 95.5% of ethanol and 4.5% of water. This is called rectified spirit. This mixture is then refluxed over quicklime for about 5 to 6 hours and then allowed to stand for 12 hours. On distillation of this mixture, pure alcohol (100%) is obtained. This is called absolute alcohol.

Characteristics of hydrocarbons
(i) Lower hydrocarbons are gases at room temperature
(ii) Alkanes are least reactive where Alkynes are most reactive due to presence triple bond
(iii) Alkanes are saturated whereas alkenes and alkynes are unsaturated
(iv) They are insoluble in water

Hydrocarbons are classified into three classes such as:
(i) Alkanes
(ii) Alkenes
(iii) Alkynes
(i) Alkanes: These are hydrocarbons which contain only single bonds. They are represented by the general formula C_nH_{2n + 2} (where n = 1,2,3, ).
Ex: Methane (CH₄).
(ii) Alkenes: The hydrocarbons which contain one or more C=C bonds are called alkenes. These are unsaturated compounds. They are represented by the general formula C_nH_2n.
(iii) Alkynes: The hydrocarbons containing carbon to carbon triple bond are called alkynes. They have the general formula C_nH_2n-2.
Ex: Acetylene (C₂H₂)

(i) Organic compounds have high molecular weight and complex structure
(ii) They are mostly insoluble in water and soluble in organic solvents such as ether, carbon tetrachloride, toluene, etc.
(iii) They are highly flammable.
(iv) Organic compounds are less reactive compared to inorganic compounds.
(v) Organic compounds form covalent bonds.
(vi) They have lower melting point and boiling point.
(vii) They exhibit the phenomenon of isomerism.
(viii) They are volatile in nature.
(ix) They can be prepared in the laboratory.