Question

Which of the following ions pass through the slit and reach the collecting plate?

(a) Negative ions of all masses

(b) Positive ions of all masses

(c) Negative ions of specific mass

(d) Positive ions of specific mass

This question was addressed to me in a job interview.

This is a very interesting question from Principle of operation of Mass Spectrometer in division Mass Spectrometer of Analytical Instrumentation

Answer 1

Right answer is (d) Positive ions of specific mass

Easiest explanation: Positive ions of specific mass pass through the slit and reach the collecting plate. These ions are measured.