Multiple choice

Which of the following statements are TRUE?

  1. H2S is more acidic than H2Te.
  2. Ozone is thermodynamically more stable than oxygen.
  3. The two oxygen-oxygen bond lengths in the ozone molecule are identical.
  4. Rhombic sulphur is the stable form of sulphur at room temperature.

  1. Both 1 and 2

  2. Both 1 and 4

  3. Both 2 and 3

  4. Both 3 and 4

  5. Both 2 and 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The two oxygen-oxygen bond lengths in the ozone molecule are identical (128 pm) and the molecule is angular as expected with a bond angle of about 117o. Sulphur forms numerous allotropes of which the yellow rhombic and monoclinic forms are the most important. The stable form at room temperature is rhombic sulphur, which transforms to monoclinic sulphur when heated above 369 K.

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