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  • Classify the substances given in Fig. 2.2 into elements and compounds.

Classify the substances given in Fig. 2.2 into elements and compounds.

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Solution:
Elements – pure substance which cannot be broken down in simpler substance
 Cu (metal), Zn (metal), F_{2} (gas), O_{2} (gas), diamond (Carbon-non-metal), Hg (metal)
Compounds – They are also pure, but can be broken down in constituents.
CaCO_{3}, H_{2}O, NaCl(aq), Wood and Sand 

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