Study the following table and then use it to answer the questions that follow

Study the following table and then use it to answer the questions that follow

These organic compounds belong to the same homologous series.
i). What is meant by the term homologous series?
ii). To which homologous series do the above hydrocarbons belong?
iii). Select one hydrocarbon that would be a liquid at room temperature 298K. Give a reason for your answer
iv). What is the relationship between the boiling point and the relative molecular masses of
the hydrocarbons in the table above? Explain your answer
v). Give one chemical test to distinguish between C₂H₆ and the third member to the homologous series of the general formula C_nH₂n.

Answers

(i) Group of compounds with similar chemical properties and chemical formula showing a
steady gradual change in physical properties
(ii) Alkanes
(iii) C₅H₁₂ or C₆H₁₄ vBoiling points higher than room than temperature
(iv) Boiling point increases with increase in molecular mass. Strength of intermolecular forces
/vander waals forces increases with increase in molecular mass. v
(v) 3rd member –C₄H₈ . bubble C₄H₈ and C₂H₆ separately into orange Bromine water.
decolourises bromine water but not C₂H₆C₄H₈

sharon kalunda answered the question on May 16, 2019 at 13:13

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