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Happy St. Patrick's Day!

WHICH OF THE FOLLOWING ARE GREEN?

  • 540 nm or 600 nm
  • bromothymol blue in a basic solution or a neutral solution
  • copper(II) chloride dihydrate or copper(II) oxide
  • chlorophyll or carotene
  • BaCl2 salt or CaCl2 salt in fireworks
  • flame test for boron or sodium
  • hematite or malachite
  • Al2O3, with Cr3+ replacing a few Al3+ in octahedral sites or Be3Al2(SiO3)6, Cr3+ replacing a few Al3+ in octahedral sites

 

 Answers

 

Source: Taken from the March 2007 issue of Chem 13 News