Question:
Identify the major product formed when 2-Methylhexan-3-ol is heated with concentrated sulphuric acid.
Identify the major product formed when 2-Methylhexan-3-ol is heated with concentrated sulphuric acid.
Show Hint
Acid-catalysed dehydration follows Saytzeff's rule and gives the more substituted alkene.
Updated On: Nov 13, 2026
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
Heating an alcohol with concentrated \(\text{H}_2\text{SO}_4\) causes dehydration. The major product is the more substituted (more stable) alkene, by Saytzeff's rule.
Step 2: Structure of the Alcohol
2-Methylhexan-3-ol is \((\text{CH}_3)_2\text{CH}-\text{CH(OH)}-\text{CH}_2\text{CH}_2\text{CH}_3\).
Step 3: Possible Alkenes
Removing H from C-2 gives \((\text{CH}_3)_2\text{C}=\text{CH}-\text{CH}_2\text{CH}_2\text{CH}_3\), a trisubstituted alkene. Removing H from C-4 gives a disubstituted alkene.
Step 4: Match the Image
Option (A) shows the trisubstituted alkene 2-methylhex-2-ene, which is the major product.
Final Answer:
The major product is 2-methylhex-2-ene. \[ \boxed{\text{(A) }\text{2-Methylhex-2-ene (trisubstituted alkene)}} \]
Heating an alcohol with concentrated \(\text{H}_2\text{SO}_4\) causes dehydration. The major product is the more substituted (more stable) alkene, by Saytzeff's rule.
Step 2: Structure of the Alcohol
2-Methylhexan-3-ol is \((\text{CH}_3)_2\text{CH}-\text{CH(OH)}-\text{CH}_2\text{CH}_2\text{CH}_3\).
Step 3: Possible Alkenes
Removing H from C-2 gives \((\text{CH}_3)_2\text{C}=\text{CH}-\text{CH}_2\text{CH}_2\text{CH}_3\), a trisubstituted alkene. Removing H from C-4 gives a disubstituted alkene.
Step 4: Match the Image
Option (A) shows the trisubstituted alkene 2-methylhex-2-ene, which is the major product.
Final Answer:
The major product is 2-methylhex-2-ene. \[ \boxed{\text{(A) }\text{2-Methylhex-2-ene (trisubstituted alkene)}} \]
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 Alcohols Questions
- The correct order of boiling point for primary $ (1^{\circ}) $ , secondary $ (2^{\circ}) $ and tertiary $ (3^{\circ}) $ alcohols is
- The correct order of dehydration of alcohols is
- Which reagent will best convert alcohol to aldehyde selectively?
- Which reagent will best convert alcohol to aldehyde selectively?
- Which of the following is a primary alcohol?
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