MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions
A gas ‘X’ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here, the gas X is (AIIMS 2018)
A.neon
B.argon
C.krypton
D.helium✓ Correct
Explanation
Helium is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Liquid helium is used as cryogenic agent for carrying out various experiments at low temperature.
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