Question

Noble gases (like He, Ne, Ar, Kr etc.) are isolated from air. One of the steps is/are:

• A. heating air with Li or Mg
• B. bubbling air into NaOH solution
• C. both (a) and (b) are correct
• D. None of the above is correct

Answer 1

Answer: (C)

both (a) and (b) are correct

For isolation of noble gases from air we can use 2 methods like , heating air with $Li$ or $Mg$ and bubbling air into $NaOH$ solution.

$Li+N_2\to L{i}_{3}N$

$Mg+O_2\to MgO$

By, both the reaction involves $O_2$ and $N_2$

$NaOH+C{O}_2\to N{a}_{2}C{O}_3$

$C{O}_2$ is removed