Question

my dnp test result was bright orange solid

tollens result was clear

chromic acid was orange

iodoform was clear/yellowish

i believe my unknown is ketone but im not sure   

I. Circle the letter that best describes your unknown. a. Aliphatic aldehyde b. Aromatic aldehyde c. Ketone II. Which of the above possibilities best describes the flavoring agent? III. Check below if a CH,-C- group is present in b. the flavoring agent. a. your unknown Questions 1. Which of the following reagents or tests would you use to differentiate between

Answer 1

Dnp reacts with both aldehydes and ketones.

Tollens reagent is reduced by only aliphatic and aromatic aldehyde but not by ketones.

Since tollens' test was clear this means the unknown is not aldehyde. Infact it is ketone.

Since the colour of chromic acid was orange don't turned to green this means unknown is not aldehyde because in the presence of aldehyde the colour would have changed to green.

SO, OVERALL CONCLUSION IS 'THE UNKNOWN IS A KETONE'

II) Aromatic aldehydes

III) present in unknown