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OpenStudy (anonymous):
Consider the following properties: I) Objects made of silver become tar- nished. II) The boiling point of ethanol is 78 ◦ C. III) The red color of rubies is due to the presence of chromium ions. Which is/are chemical? 1. I and II only 2. I and III only 3. None of these 4. I, II and III 5. I only 6. II and III only 7. III only 8. II only
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