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Chapter 2: Problem 170

The compound which gives methanal, ethanal and glyoxal on ozonolysis is (a) Hexa-1,3-diene (b) Penta- 1,3 -diene (c) Penta- 1,4 -diene (d) Penta-1,2-diene

Short Answer

Expert verified
Answer: Penta-1,4-diene

Step by step solution

01

Option (a) Hexa-1,3-diene

The structure of this compound has six carbon atoms and two double bonds at the first and third positions. If we perform ozonolysis on this compound, two double bonds will be cleaved, leading to the formation of two aldehyde groups and two ketone [O], resulting in two molecules of acetaldehyde (~(CH_3CHO~)).
02

Option (b) Penta-1,3-diene

The structure of this compound has five carbon atoms and two double bonds at the first and third positions. Upon performing ozonolysis, it will produce two aldehyde groups and only one ketone[O], forming one molecule of methanal(~HCHO~) and one molecule of ethanal(~CH_3CHO~).
03

Option (c) Penta-1,4-diene

The structure of this compound has five carbon atoms and two double bonds at the first and fourth positions. During ozonolysis, the carbon-carbon double bonds will break and form an aldehyde group and two ketone[O], producing exactly one molecule of methanal(~HCHO~), one molecule of ethanal (~CH_3CHO~), and one molecule of glyoxal (~OCHCHO~). This is the compound we are looking for.
04

Option (d) Penta-1,2-diene

The structure of this compound has five carbon atoms and two double bonds at the first and second positions. Performing ozonolysis on this compound will result in two carbonyl groups[O] on the first carbon atom, making it unstable and not producing the correct products. Thus, the correct answer is: (c) Penta-1,4-diene

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Most popular questions from this chapter

Which of the following alkenes will undergo acid catalysed hydration most readily? (a) (b) Cis-2-butene (c) trans-2-butene (d) 1 -butene

The product formed when ethene and air under pressure is passed over silver catalyst heated to \(500 \mathrm{~K}\) is (a) Epoxy ethane (b) Ethanal (c) Ethanoic acid (d) Methanal

Directions: Each question contains Statement-1 and Statement-2 and has the following choices (a), (b), (c) and (d), out of which ONLY ONE is correct. (a) Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanation for Statement-1 (b) Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanation for Statement-1 (c) Statement-1 is True, Statement- 2 is False (d) Statement- 1 is False, Statement- 2 is True Statement 1 Erythro-2,3-dibromobutane on reaction with zinc and alcohol gives trans 2 -butene. and Statement 2 Elimination requires trans periplanar geometry.

The maximum number of optical isomers produced on monochlorination of 2 -methylbutane will be (a) 2 (b) 3 (c) 4 (d) 1

\(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{Br}_{2} \rightarrow(\mathrm{A}) \stackrel{\mathrm{NaNH}_{2}}{\longrightarrow}(\mathrm{B}) \stackrel{\mathrm{H}^{+}}{\longrightarrow}(\mathrm{C}) .\) The structure of (C) is (a) \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH}\) (b) \(\mathrm{H}_{3} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\) (c) \(\mathrm{BrCH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{Br}\) (d) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{C}=\mathrm{CH}_{2}\)
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