Unknown alcohol or phenol was tested in the lab. When chromic acid was added, it turned from orange to green. When FeCl3 was added to a separate portion of the unknown, it turned purple. What can you say about the structure of this unknown?

Explanation:

The compound is phenol . When phenol reacts with FeCl₃ , it forms complex with purple colour .

FeC₃ + C₆H₅OH >  Fe(C₆H₅O)₆ + 3H⁺ + HCl

When phenol reacts with chromic acid , it is oxidised to 1,4 benzoquinone or simply quinone.  Colour of solution changes from orange to green.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.