Short Answer TypeWhat are petrochemicals? Discuss their importance.
Petrochemicals are the compounds which are derived either from petroleum or natural gas. Important petrochemicals are methane, ethane, propane, ethylene propylene, hexane, heptane, cycloalkanes, benzene, toluene etc.
Importance:
(i) Petrochemicals are very useful for providing raw materials for the manufacture of dyes, drugs, polymers, detergents, food preservatives, disinfectants etc.
(ii) These petrochemicals are widely used in the manufacture of iso-octane, plastics (polythene, PVC), synthetic rubber, insecticides, pesticides, explosives etc.
Long Answer TypeShort Answer TypeArrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give a reason for this behaviour.
Multiple Choice QuestionsBenzene can be conveniently converted into n-propyl benzene by
Friedel-Craft alkylation with n-propyl chloride
Friedel-Craft acylation with propionyl chloride followed by Wolff-Kishner reduction
Friedel-Craft acylation with propionyl chloride followed by catalytic hydrogenation
Friedel-Craft acylation with propionyl chloride followed by reduction with LiAlH4
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O2 by volume for complete combustion. After combustion the gases occupy 330 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
C3H8
C4H8
C4H12
C4H12
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