MolSynapsequestion bank
MolSynapse / Question bank / p-Block Elements: Groups 17 and 18 / Noble gases: xenon fluorides, oxides and oxyfluorides
JEE Main levelOne or more correct optionsDifficulty 2 of 3ph139

Which of the following statements about the noble gases are correct?

  1. ABoiling point increases from He to Rn.
  2. BFirst ionisation enthalpy decreases from He to Rn.
  3. Cvan der Waals radius decreases from He to Rn.
  4. DElectron gain enthalpies of the noble gases are positive.

Answer: A, B, D

Ionisation enthalpy decreases down the group as size increases, and boiling points rise because dispersion forces grow. Noble gases have stable closed shells, so adding an electron needs energy (positive electron gain enthalpy). Atomic radius increases down the group, so the last statement is false.
Practice p-Block Elements: Groups 17 and 18 More on Noble gases: xenon fluorides, oxides and oxyfluorides
Previous questionNext question

More questions on Noble gases: xenon fluorides, oxides and oxyfluorides