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Consider the following statements about Infrared (IR) spectroscopy.
A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.
B. It is used to identify the functional group(s) of a compound.
C. It is used to characterize different stretching and bending modes of vibration in molecules.
D. Heteronuclear diatomic molecules are IR-active.
The correct statements are
A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.
B. It is used to identify the functional group(s) of a compound.
C. It is used to characterize different stretching and bending modes of vibration in molecules.
D. Heteronuclear diatomic molecules are IR-active.
The correct statements are
- a)A, B, C, and D
- b)B, C, and D only
- c)A, B, and C only
- d)B and C only
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements about Infrared (IR) spectroscopy.A. ...
Statement-A
A. Infrared (IR) spectroscopy is not typically used to determine the band gap, band structure, or charge carrier concentration of a compound. These properties are more commonly studied using techniques like solid-state physics, electronic spectroscopy, and electrical measurements.
Thus, statement A is incorrect.
Statement-B
B. IR spectroscopy is widely used to identify functional groups in a compound. Different functional groups in molecules exhibit characteristic absorption bands in the IR region, allowing researchers to infer the presence of specific functional groups in the sample.
Thus, statement B is correct.
Statement-C
C. IR spectroscopy is indeed used to characterize different stretching and bending modes of vibration in molecules. As molecules vibrate, they absorb specific infrared frequencies corresponding to the stretching and bending of chemical bonds. This information helps identify the molecular structure.
Thus, statement C is correct.
Statement-D
D. Heteronuclear diatomic molecules are indeed IR active. Heteronuclear diatomic molecules have different atoms bonded together, and they exhibit a change in their dipole moment during vibration, which makes them IR active. Homonuclear diatomic molecules (those with identical atoms) do not show this behavior and are not typically IR-active.
Thus, statement D is correct.
A. Infrared (IR) spectroscopy is not typically used to determine the band gap, band structure, or charge carrier concentration of a compound. These properties are more commonly studied using techniques like solid-state physics, electronic spectroscopy, and electrical measurements.
Thus, statement A is incorrect.
Statement-B
B. IR spectroscopy is widely used to identify functional groups in a compound. Different functional groups in molecules exhibit characteristic absorption bands in the IR region, allowing researchers to infer the presence of specific functional groups in the sample.
Thus, statement B is correct.
Statement-C
C. IR spectroscopy is indeed used to characterize different stretching and bending modes of vibration in molecules. As molecules vibrate, they absorb specific infrared frequencies corresponding to the stretching and bending of chemical bonds. This information helps identify the molecular structure.
Thus, statement C is correct.
Statement-D
D. Heteronuclear diatomic molecules are indeed IR active. Heteronuclear diatomic molecules have different atoms bonded together, and they exhibit a change in their dipole moment during vibration, which makes them IR active. Homonuclear diatomic molecules (those with identical atoms) do not show this behavior and are not typically IR-active.
Thus, statement D is correct.
Hence, the correct statements are B, C, and D.
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Community Answer
Consider the following statements about Infrared (IR) spectroscopy.A. ...
Explanation:
Identifying the correct statement:
- Statement B is the correct statement about Infrared (IR) spectroscopy.
- IR spectroscopy is commonly used to identify the functional group(s) present in a compound based on the characteristic absorption bands in the infrared region.
Explanation of Incorrect Statements:
Statement A:
- IR spectroscopy is not typically used to determine the band gap, band structure, or charge carrier concentration of a compound.
- These properties are more commonly studied using techniques such as UV-Vis spectroscopy, X-ray crystallography, or Hall effect measurements.
Statement C:
- IR spectroscopy is used to characterize different stretching and bending modes of vibration in molecules.
- This is one of the key applications of IR spectroscopy, as different functional groups exhibit characteristic IR absorption bands corresponding to specific vibrational modes.
Statement D:
- Heteronuclear diatomic molecules are typically not IR-active.
- IR absorption in diatomic molecules is primarily observed in homonuclear molecules due to changes in dipole moment during vibration.
Therefore, the correct statement is B: "It is used to identify the functional group(s) of a compound."
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Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer?
Question Description
Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer?.
Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements about Infrared (IR) spectroscopy.A. It is used to determine the band gap, the band structure, and the charge carrier concentration of a compound.B. It is used to identify the functional group(s) of a compound.C. It is used to characterize different stretching and bending modes of vibration in molecules.D. Heteronuclear diatomic molecules are IR-active.The correct statements area)A, B, C, and Db)B, C, and D onlyc)A, B, and C onlyd)B and C onlyCorrect answer is option 'B'. Can you explain this answer?.
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