Sulphur & its compounds

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Across
  1. 2. stage 3 molten sulphur poured into water produces ... sulphur
  2. 3. the solubility of sulphur dioxide can be demonstrated by the ... experiment
  3. 7. salt of sulphuric acid, used as a laxative
  4. 8. sulphuric acid is used for ... tanning
  5. 9. the colour of sulphur
Down
  1. 1. sulphur produces this with metals in exotermic reactions
  2. 2. sulphur dioxide contributes to the formation of ...rain
  3. 4. sulphuric acid's geometry
  4. 5. gypsum's mineral form
  5. 6. SO3 is dissolved in concentrated H2SO4 to produce this