6. Samples of urine from three participants F, G and H at an international sports meeting were spotted onto a chromatography paper alongside two from illegal drugs A1 and A2. A chromatogram was run using
methanol. The figure below shows the chromatogram.
Solvent front
A,
F
(1mk)
a) Identify the athlete who had used an illegal drug
(1mk)
b) Which drug is more soluble in methanol?

Which statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?