Chemistry 5070 · O Level · Experimental design

Experimental design — practice question

Which row is the correct one?

  • Apurpose of hydrogen-oxygen fuel cell: to recycle waste; chemical product of hydrogen-oxygen fuel cell: hydrogen
  • Bpurpose of hydrogen-oxygen fuel cell: to recycle waste; chemical product of hydrogen-oxygen fuel cell: water
  • Cpurpose of hydrogen-oxygen fuel cell: to produce electrical energy; chemical product of hydrogen-oxygen fuel cell: hydrogen
  • Dpurpose of hydrogen-oxygen fuel cell: to produce electrical energy; chemical product of hydrogen-oxygen fuel cell: water

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