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Which of the following statements regarding mass spectrometry is false?
- a)The base peak of a simple ketone is usually attributable to an acylium ion.
- b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.
- c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.
- d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements regarding mass spectrometry is false...
Understanding Mass Spectrometry and Structural Isomerism
In mass spectrometry, the ability to distinguish between isomeric compounds is crucial for accurate analysis. Let's break down why option 'D' is the correct answer.
Isomeric Alkanes and Mass Spectrometry
- Structural Isomers: Alkanes can exist as structural isomers, which have the same molecular formula but different arrangements of atoms.
- Low Resolution Mass Spectrometry: Low resolution mass spectrometry typically measures mass-to-charge ratios (m/z) without providing detailed structural information. As a result, it cannot differentiate between isomers that have the same m/z value.
Why Option D is True
- Identical Molar Mass: Structurally isomeric alkanes (e.g., pentane, 2-methylbutane) possess the same molecular formula (C5H12) and hence the same molecular ion peak in low resolution mass spectrometry.
- Insufficient Resolution: Low resolution instruments lack the capability to resolve small differences in mass that would distinguish isomers, making it impossible to identify them based solely on their mass spectra.
Conclusion
- While other options (a, b, c) accurately describe specific behaviors of different functional groups in mass spectrometry, option 'D' correctly highlights a limitation of low resolution mass spectrometry in distinguishing structurally isomeric alkanes.
This understanding is critical in organic chemistry and analytical applications, where precise identification of compounds is essential.
In mass spectrometry, the ability to distinguish between isomeric compounds is crucial for accurate analysis. Let's break down why option 'D' is the correct answer.
Isomeric Alkanes and Mass Spectrometry
- Structural Isomers: Alkanes can exist as structural isomers, which have the same molecular formula but different arrangements of atoms.
- Low Resolution Mass Spectrometry: Low resolution mass spectrometry typically measures mass-to-charge ratios (m/z) without providing detailed structural information. As a result, it cannot differentiate between isomers that have the same m/z value.
Why Option D is True
- Identical Molar Mass: Structurally isomeric alkanes (e.g., pentane, 2-methylbutane) possess the same molecular formula (C5H12) and hence the same molecular ion peak in low resolution mass spectrometry.
- Insufficient Resolution: Low resolution instruments lack the capability to resolve small differences in mass that would distinguish isomers, making it impossible to identify them based solely on their mass spectra.
Conclusion
- While other options (a, b, c) accurately describe specific behaviors of different functional groups in mass spectrometry, option 'D' correctly highlights a limitation of low resolution mass spectrometry in distinguishing structurally isomeric alkanes.
This understanding is critical in organic chemistry and analytical applications, where precise identification of compounds is essential.
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Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer?.
Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemistry.
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ample number of questions to practice Which of the following statements regarding mass spectrometry is false?a)The base peak of a simple ketone is usually attributable to an acylium ion.b)The molecular ion of carbonyl compounds with a -C-H readily undergoes elimination of an alkene to give a relatively stable enol radical cation.c)The molecular ion peak of some alcohols is very weak because it readily loses an alkyl radical to give a relatively stable oxonium (hydroxycarbenium) ion.d)Structurally isomeric alkanes cannot be distinguished by low resolution mass spectrometry.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Chemistry tests.
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