Question:
Which among the following compounds has highest boiling point?
Which among the following compounds has highest boiling point?
Show Hint
Within a homologous series, boiling point increases with molecular mass and chain length.
Updated On: Nov 13, 2026
- Propanal
- Ethanal
- Pentanal
- Hexanal
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Aldehydes are polar and have dipole-dipole attractions.
Within a homologous series, van der Waals forces increase with size, so boiling point rises with chain length.
Step 2: Carbon count
Ethanal has 2 carbons, propanal 3, pentanal 5 and hexanal 6.
Step 3: Conclusion
Hexanal has the longest chain, so it has the highest boiling point.
Final Answer:
Hexanal has the highest boiling point. \[ \boxed{\text{(D) }\text{Hexanal}} \]
Aldehydes are polar and have dipole-dipole attractions.
Within a homologous series, van der Waals forces increase with size, so boiling point rises with chain length.
Step 2: Carbon count
Ethanal has 2 carbons, propanal 3, pentanal 5 and hexanal 6.
Step 3: Conclusion
Hexanal has the longest chain, so it has the highest boiling point.
Final Answer:
Hexanal has the highest boiling point. \[ \boxed{\text{(D) }\text{Hexanal}} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Aldehydes, Ketones and Carboxylic Acids Questions
- The number of pi-bonds present in benzoic acid molecule are
- Ethyl methyl ketone is obtained by heating calcium salts of
- Formalin is the commercial name of
- An ester $ (A) $ with molecular formula $ C_9H_{10}O_2 $ was treated with excess of $ CH_3MgBr $ and the complex so formed was treated with $ H_2SO_4 $ to give an olefin $ (B) $ . Ozonolysis of $ (B) $ gave a ketone with molecular formula $ C_8H_8O $ which shows positive iodoform test. The structure of $ (A) $ is
- Cannizaro?s reaction is not given by
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions