Q. Nier-Johnson geometry involves a deflection of which of the following radians in a radial electrostatic field analyser?

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Q. An accuracy of 1 part in 10² has been obtained in precision mass measurements.

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Q. Which of the following is not a component of the time of flight analyser spectrometer?

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Q. Time of flight mass spectrometer has an unlimited mass range.

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Q. Which of the following is not an advantage of mass spectrometer?

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Q. All the ions entering the tube have the same kinetic energy.

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Q. If all the ions have the same kinetic energy how are their masses related to their velocities?

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Q. Which of the following is true about time of flight analyser spectrometers?

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Q. In the time of flight mass spectrometer, ions are formed by which of the following methods?

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Q. The evacuated tube is also known as which of the following?

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Q. The current produced by ions arriving at the collector necessitates the use of which of the following?

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Q. Which of the following is an ion optic device in which ions pass through a mirror and their flight is reversed?

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Q. Which of the following statements about mass spectrometers are not true?

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Q. Which of the following is placed just before the detector in a radiofrequency mass spectrometer?

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Q. Which of the following is applied in one or more stages where each stage is a series of three equally spaced parallel grids?

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Q. The alternating voltage rf voltage is applied to which of the following?

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Q. The rf spectrometer contains a magnet.

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Q. The DC ion accelerating voltage is swept from _________

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Q. The resolution of the Bennet tube can be improved by using which of the following?

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Q. In Bennet spectrometer, the rf voltage has a fixed frequency.

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