Question

a student is trying to identify an unknown solid. they find that it is colorless and has a camphor - like odor. they then determine its melting point to be 26°c. using the table of physical properties below, what is the identity of the unknown substance? select one: ethanol cyclohexane 2 - butanone tert - butanol substance ethanol cyclohexane tert - butanol 2 - butanone color colorless colorless colorless colorless odor alcoholic mild, sweet camphor - like sweet melting point (°c) - 114 7 26 - 86

Explanation:

The student is identifying a substance based on physical properties (color, odor, melting point). The unknown is colorless, has a camphor - like odor, and a melting point of \(26^{\circ}C\). By matching these properties to the table:

• Ethanol has an alcoholic odor and a melting point of \(- 114^{\circ}C\).
• Cyclohexane has a mild, sweet odor and a melting point of \(7^{\circ}C\).
• 2 - butanone has a sweet odor and a melting point of \(-86^{\circ}C\).
• tert - butanol is colorless, has a camphor - like odor, and a melting point of \(26^{\circ}C\), which matches the unknown's properties.

Answer:

tert - butanol