COMEDK · Chemistry · 14. Hydrocarbons
Consider the following reaction
\(\mathrm{X} \xrightarrow[\text { (ii) } \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3} \text { 5-keto-2-methylhexanal }\)
The reactant ' X ' is:
- A 1,2-dimethylcyclopentene
- B 1,3-dimethylcyclopentene
- C 1,5-dimethylcyclopentene
- D 1,4-dimethylcyclopentene
Answer & Solution
Correct Answer
(B) 1,3-dimethylcyclopentene
Step-by-step Solution
Detailed explanation
Reductive ozonolysis cleaves the \(C=C\) bond and replaces it with two carbonyl groups. To find X, we perform reverse ozonolysis on the product. Product: 5-keto-2-methylhexanal \(O=CH-CH(CH_3)-CH_2-CH_2-C(=O)-CH_3\) The two carbonyl carbons are C1 (aldehyde) and C5 (ketone).…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The decreasing order of reactivity towards electrophilic substitutions is:
COMEDK 2026 Medium - Select the reagents needed to convert Benzene to 4–Bromophenylpropene in the correct sequential order.
(A). \(\text{Cl}_2/\Delta\)
(B). \((\text{CH}_3)_2\)-CHCl /anhyd. \(\text{AlCl}_3\)
(C). Alc. KOH
(D). \(\text{Br}_2\) / FeCOMEDK 2026 Hard - Given are the names of 4 compounds. Two of these compounds will not undergo Cannizzaro's reaction. Identify the two.
A. 2-Chlorobutanal
B. 2,2-Dimethylpropanal
C. Benzaldehyde
D. 2-Phenyl ethanolCOMEDK 2024 Medium - Decomposition of benzene diazonium chloride by using \(\mathrm{Cu}_{2} \mathrm{Cl}_{2} / \mathrm{HCl}\) to form chlorobenzene isCOMEDK 2020 Medium
- Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option.
Assertion: Maltose, a disaccharide, is a reducing sugar and is obtained by the partial hydrolysis of starch in presence of the enzyme diastase.
Reason: Hydrolysis of one mole of Maltose gives one mole each of \(\alpha-\mathrm{D}-\) Glucose and \(\beta-\) D-Fructose.COMEDK 2025 Medium - Identify the Carbonyl compound which will not be formed when hydration of Alkynes is carried out with dil. \(\mathrm{H}_2 \mathrm{SO}_4 / \mathrm{Hg}^{2+}\) at 333 K .
Acetone, Butanal, Ethanal, Butanone.COMEDK 2025 Medium
More PYQs from COMEDK
- - Solar spectrum is an example forCOMEDK 2018 Easy
- If \(A=\left[\begin{array}{ccc}\cos \theta & -\sin \theta & 0 \\ \sin \theta & \cos \theta & 0 \\ 0 & 0 & 1\end{array}\right]\), the cofactor of \(a_{32}\) areCOMEDK 2017 Easy
- If \(\int \dfrac{1}{\sqrt{\sin ^3 x \cos x}} d x=\dfrac{k}{\sqrt{\tan x}}+c\) then the value of \(k\) isCOMEDK 2024 Medium
- From the figure describing photoelectric effect we may infer correctly that
COMEDK 2017 Easy - The radii of \(\mathrm{Na}^{+}\)and \(\mathrm{Cl}^{-}\)ions are 95 pin and 181 pm respectively. The edge length of \(\mathrm{NaCl}\) unit cell isCOMEDK 2018 Medium
- Three of the six vertices of a regular hexagon are chosen at random. The probability that the triangle with three vertices is equilateral equalsCOMEDK 2021 Easy