Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

A test tube containing HBr(g) and another test tube containing HI(g) are warmed to the same temperature. Which pairing of observations could be seen?

  • Atube of HBr(g): a brown vapour appears; tube of HI(g): no change is apparent
  • Btube of HBr(g): a purple vapour appears; tube of HI(g): no change is apparent
  • Ctube of HBr(g): no change is apparent; tube of HI(g): a brown vapour appears
  • Dtube of HBr(g): no change is apparent; tube of HI(g): a purple vapour appears

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