Preparation and Properties of Alkanes
Chemistry ⇒ Carbon and Organic Chemistry
Preparation and Properties of Alkanes starts at 11 and continues till grade 12.
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Describe the Wurtz reaction for the preparation of alkanes.
Explain why alkanes are called paraffins.
Explain why alkanes do not react with acids, bases, or oxidizing agents under normal conditions.
Explain why the boiling point of alkanes increases with molecular mass.
Name the alkane obtained by the decarboxylation of sodium butanoate.
Name the process by which alkanes can be obtained by the reduction of alkyl halides.
A chemist wants to prepare propane using the Wurtz reaction. Which pair of alkyl halides should be used?
(1) Methyl bromide and ethyl bromide
(2) Two molecules of methyl bromide
(3) Two molecules of ethyl bromide
(4) Ethyl bromide and propyl bromide
A mixture of sodium propionate and sodium acetate is electrolyzed in Kolbe’s electrolysis. Name all possible alkanes formed.
Which of the following is a characteristic reaction of alkanes?
(1) Electrophilic addition
(2) Nucleophilic substitution
(3) Free radical substitution
(4) Elimination
Which of the following is a method for the preparation of methane in the laboratory?
(1) Heating sodium acetate with soda lime
(2) Wurtz reaction
(3) Kolbe’s electrolysis
(4) Hydrogenation of ethene
Which of the following is a property of alkanes?
(1) They are highly reactive
(2) They undergo addition reactions
(3) They are generally non-polar
(4) They are soluble in water
Which of the following is a property of higher alkanes (C18H38 and above)?
(1) Gaseous at room temperature
(2) Solid at room temperature
(3) Highly soluble in water
(4) Colored
Alkanes are also known as _______ hydrocarbons.
Alkanes are generally _______ in color.
Alkanes are generally _______ in organic solvents.
The process of converting alkenes to alkanes by adding hydrogen in the presence of a catalyst is called _______.
Alkanes are less dense than water. True or False?
State whether the following statement is true or false: Alkanes are generally soluble in water.
State whether the following statement is true or false: Alkanes can be prepared by the decarboxylation of carboxylic acids.
State whether the following statement is true or false: Alkanes can be prepared by the hydrolysis of Grignard reagents.
