D) reacts with oxygen
All other are physical properties.
The graphite of the pencil sits on top of the paper and won't affect the results. If you use ink, it will seep into the paper and itself be subjected to the chromatographic process.
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Molecular dipoles occur due to the unequal sharing of electrons between atoms in a molecule. Those atoms that are more electronegative pull the bonded electrons closer to themselves.
Answer is ccl4
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Answer:
plastic rays i think the matetial that can widely recycle