Content Preview

Alkanes - AQA A-Level Chemistry Exam 2025 Questions and Answers What are alkanes? - --CORRECT ANSWER--Saturated hydrocarbons. What does it mean by a saturated hydrocarbon. - --CORRECT ANSWER--It is a hydrocarbon since it only has hydrogen and carbon atoms and it is saturated since it only has single C-C bonds. What is the general formula for alkanes? - --CORRECT ANSWER--CnH2n+2 Are alkanes polar or non-polar and why? - --CORRECT ANSWER--Alkanes are non-polar because carbon and hydrogen have similar electronegativities. What intermolecular forces do alkanes contain and explain why? - --CORRECT ANSWER--Alkanes are non-polar so they only contain van der Waals forces. Explain how and why the melting and boiling points of alkanes change as you increase chain length? - --CORRECT ANSWER--As the chain length increases, the number of electrons increases so the van der Waals forces become stronger, resulting in higher melting and boiling points. ....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1