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Question

Helium is used:

A
In gas-cooled nuclear reactors
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B
In discharge tubes and fluorescent bulbs for advertisement display purposes
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C
In NMR spectrometers and MRI systems
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D
As a diluent for oxygen in modern diving apparatus
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Solution

The correct options are
A In gas-cooled nuclear reactors
C In NMR spectrometers and MRI systems
D As a diluent for oxygen in modern diving apparatus
Helium is used
  • in filling balloons for meteorological observations.
  • in gas-cooled nuclear reactors.
  • as cryogenic agent for low-temperature experiments.
  • to produce and sustain powerful superconducting magnets of modern NMR spectrometers and Magnetic Resonance Imaging (MRI) systems for clinical diagnosis.
  • as a diluent for oxygen in modern diving apparatus because of its very low solubility in blood.

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