30 points
>
>
Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- CSIR NET
- Chemical Sciences
Ethyne (hcch) does not show ir absorption in the region 2000 -2500 cm because: (a) c-h stretches occur at lower energies. (b) cc stretches occur at about 1640 c
Ethyne (HCCH) does not show IR absorption in the region 2000 -2500 cm because: (a) C-H stretches occur at lower energies. (b) CC stretches occur at about 1640 cm (c) There is no change in the dipole moment when the CC bond in ethyne stretches. (d) there is a change in the dipole moment when the CC bond in ethyne stretches.
2 Answer(s)
Answer Now
- 0 Likes
- 2 Comments
- 0 Shares
-
![comment-profile-img]()
>
-
![comment-profile-img]()
>
Bhagat singh 1
![best-answer]()
Answer c is correct. Ethyne (HC≡CH) does not show IR absorption in the region 2000-2500 cm-1 because: ... C) there is no change in the dipole moment when the C≡C bond in ethyne stretches.
Do You Want Better RANK in Your Exam?
Start Your Preparations with Eduncle’s FREE Study Material
- Updated Syllabus, Paper Pattern & Full Exam Details
- Sample Theory of Most Important Topic
- Model Test Paper with Detailed Solutions
- Last 5 Years Question Papers & Answers
Sign Up to Download FREE Study Material Worth Rs. 500/-
Dinesh khalmaniya 1 Best Answer
option C To show ir spectra, change in the dipole moment is must. In the region 2000- 2500 cm- if IR spectra not shown mean there is no change in the dipole moment in this region.