Ethyne (HC CH) Does Not Show IR Absorption in the Region

question 77

Multiple Choice

Ethyne (HC CH) does not show IR absorption in the region 2000-2500 cm^-1 because ________.

• A) C-H stretches occur at lower energies
• B) C C stretches occur at about 1640 cm^-1
• C) there is no change in the dipole moment when the C C bond in ethyne stretches
• D) there is a change in the dipole moment when the C C bond in ethyne stretches

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