MolSynapsequestion bank
MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Trends in groups 15 and 16
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pn018

Which of the following statements about the hydrides and the elements of group 16 are correct?

  1. AThe electron gain enthalpy of sulphur is more negative than that of selenium.
  2. BThe first ionisation enthalpy of sulphur is lower than that of oxygen.
  3. C ionises to a greater extent in water than .
  4. DThe electron gain enthalpy of oxygen is more negative than that of sulphur.

Answer: A, B, C

Electron gain enthalpies (kJ/mol): O -141, S -200, Se -195, Te -190, so S is the most negative and the second statement is false. Acidity of increases down the group (weaker H-E bond), so . Ionisation enthalpy decreases down the group, so S is lower than O. Correct: A, C, D.
Practice p-Block Elements: Groups 15 and 16 More on Trends in groups 15 and 16
Previous questionNext question

More questions on Trends in groups 15 and 16