Give reasons for i] alkanes are said to be saturated organic compounds ii] alkenes are known as olefins iii) alkenes are more reactive than alkanes iv) ethanoic acid is known as an aliphatic monocarboxylic acid. 

Why are alkenes more reactive than alkanes ?

Give reasons : (i) CH_(3)-CHO is more reactive than CH_(3)COCH_(3) towards HCN. (ii) 4-nitrobenzoic acid is more acidic than benzoic acid.

Give reasons for the following : (i) Methane does not undergo addition reactions, but ethene does. (ii) Ethyne is more reactive than ethane. (iii) Hydrocarbons are excellent fuels.

Identify the incorrect statement // statement : (i) Alkynes are more reactive than alkenes towards electrophilic addiction reaction (ii) Alkynes are less reactive than alkenes towards electrophilic addiction reaction (iii) Alkynes decolourise Br_(2) water (iv) Addition of HBr to alkenes in presence of peroxide proceeds via Markownikoff's rule

Give reasons : (i) SO_(2) is reducing while TeO_(2) is an oxidizing agent. (ii) Nitrogen does not form pentahalide. (iii) ICl is more reactive than I_(2) .

Give balanced equations for the laboratory preparations of - Alkanes, Alkenes, Alkynes, Alcohols & Acids.

Give the main uses of i] Methane ii] Ethane iii] Ethene iv] Ethyne v] Ethanol vi] Ethanoic acid.

Assign reasons for the following: (i) Formic acid and chloroacetic acid are stronger than acetic acid. (ii) Ethylamine is more basic tham ammonia.

Give reasons for the following : (i) Use of aspartame as an artificial sweetener is limited to cold foods. (ii) Metal hydroxides are better alternatives than sodiumk hydrogen carbonate for treatment of acidity. (iii) Aspirin is used in prevention of heart attacks.

Draw the structures for the following compounds. (i) Ethanoic acid , (ii) Bromopentane (iii) Butanone , (iv) Hexanal