Question

Among the five fragments given below, <br> the number of fragment(s) accelerated to the analyzer tube in mass spectrometer with electron ionization is/are _________.

Answer 1

Correct Answer: 2

To determine the number of fragments accelerated in a mass spectrometer using electron ionization, we analyze the fragments provided. Electron ionization produces ions, which can be radicals (●) or cations (+). Only charged fragments are accelerated to the analyzer tube.

Examining the fragments:

• ●CH₂-CH₃: Neutral radical, not accelerated.
• CH₃-CH₃●: Neutral radical, not accelerated.
• ●CH₃-CH₂-CH₂: Neutral radical, not accelerated.
• CH₂=CH⁺=CH₂: Positively charged, accelerated.
• [CH₃-CH₂-CH₂]⁺●: Positively charged radical, accelerated.

There are 2 positively charged fragments.

Conclusion: The number of fragments accelerated is 2, which fits within the given range (2,2).