Upto ___________________ C atoms alkanes are gases?
Correct answer: C. 4
- A. 2
- B. 3
- C. 4
- D. 6
Explanation
Methane, ethane, propane and butane, containing 1 to 4 carbon atoms, are gases at ordinary room temperature because their weak intermolecular forces give them low boiling points. Students may choose 6 because larger alkanes are still relatively volatile, but pentane and higher members are liquids under ordinary conditions.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
Practise Chemistry of Hydrocarbons
1,091 free Chemistry of Hydrocarbons MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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