The noble gas compound prepared by Bartlett was

Liquid $X$ is used in a bubble chamber to detect neutral mesons and gamma photons. Then, $X$ is

$XeF_6$ on hydrolysis produces

$A$ gas $X$ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here,the gas $X$ is

Who discovered the first noble gas?

Which of the following statements is not correct?