Primary/secondary/tertiary Alcohol Test

Question 1

How do you test wether something is a primary/secondary alcohol as opposed to a tertiary alcohol
Or an aldehyde as opposed to a ketone

Answer 1

Mix a few cm^3 of the liquid or solution with acidified potassium dichromate(VI) solution in a test tube and warm in a water bath

Question 2

Orange solution changes to green and there’s a change in smell
What are the deductions

Answer 2

Primary or secondary alcohol
Or aldehyde
Can be oxidised

Question 3

Solution remains orange

What are the deductions

Answer 3

Tertiary alcohol or ketone

Cannot be oxidised