Question

Which of the following has a c-h stretch that occurs at the highest stretching frequency?

A) Alkane
B) Alkene
C) Alkyne
D) Aromatic compound

Answer 1

The stretching frequency of a C-H bond is highest in an alkyne.

Step-by-step explanation:

The stretching frequency of a C-H bond in an infrared (IR) spectrum is influenced by the type of carbon-hydrogen bond and the surrounding functional groups. In general, alkynes have the highest stretching frequency for a C-H bond, followed by alkenes, while alkanes have the lowest stretching frequency.

Therefore, the correct answer is C) Alkyne, as it has a C-H stretch that occurs at the highest stretching frequency.