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Grade: 11

                        

write any three preparation of alkanes?

6 years ago

Answers : (1)

Aarti Gupta
askIITians Faculty
300 Points
							Alkanes can be prepared by following ways:-
1.From unsaturated hydrocarbons:-By hydogenation using catalysts like Pd,Pt or Ni

2. From alkyl halides via Wurtz reaction:- In dry ether

CH3Br + 2Na + BrCH3 ------------> CH3-CH3 + 2NaBr

3.From carboxylic acids:-Sodium salt of carboxylic acids on heating with soda lime(mixture of NaOH + CaO) gives alkanes containing 1C atom less than the acid.CO2 removes form acid so process is called decarboxylation.

CH3COONa + soda lime --------------> CH4 + Na2CO3

Thanks & Regard

Aarti Gupta

askiitians Faculty
6 years ago
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