Deck 16: The Group 16 Elements

Question 1

Find incorrect statement regarding low reactivity of O₂ molecule.

A) It has a high bond energy.
B) Its electronic configuration does not allow for Lewis acid/base reactivity.
C) It easily forms stable complexes that impede any further reactivity.

Answer 1

C

Question 2

Which of the following is not an industrial process for isolation of elemental sulfur:

A) Oswald process
B) Frasch process
C) Claus process

Answer 2

A

Question 3

A steady increase in boiling points for hydrides of sulfur, selenium and tellurium can be attributed to:

A) A decrease in vapour pressure
B) An increase in molecular weight
C) A decrease in hydrogen bond strength.

Answer 3

B

Question 4

Which of the following species has the longest O-O bond:
(i) O₂
(ii) O₂^-
(iii) O₂^2-

A) (i)
B) (ii)
C) (iii)

Question 5

Which metals form disulfides with layered structure?

A) 4d metals
B) 3d metals
C) s block metals

Question 6

Find correct statement(s) about sulfur oxides:
(i) SO₂ is neither a Lewis acid nor a Lewis base.
(ii) Both SO₂ and SO₃ are acidic oxides.
(iii) SO₂ is produced on a large scale in industry.

A) (i) and (ii)
B) (iii) only
C) (ii) and (iii)

Question 7

If a mixture of H₂S₂O₇ and H₂SO₄ contains HS₂O₇^- and H₃SO₄⁺, what can be concluded about relative strengths of these two acids:

A) H₂SO₄ is a stronger acid than H₂S₂O₇
B) H₂SO₄ is a weaker acid than H₂S₂O₇
C) H₂S₂O₇ is more basic than H₂SO₄

Question 8

Which of the following acids is an example of a polythionic acid?

A) H₂S₂O₇.
B) H₂S₆O₆.
C) H₂S₂

Question 9

Which polyanions frequently have bicyclic structures?

A) Polysulfides.
B) Polyselenides.
C) Polytellurides.

Question 10

Both S₄N₄ and S₂N₂ are:

A) thermodynamically unstable
B) common precursors for sulfur chemistry in low oxidation states
C) easy to handle.