Créer une activité
Créer une activité
Toutes les activités
Jouer Test
1. 
What is the primary disadvantage of using finely grounded cloves as sample?
A.
it may cause bumping of the solution
B.
it may cause the fine powders to evaporate
C.
no eugenol can be extracted from finely grounded cloves
D.
fine powders can be seen on the distillate
2. 
How is the boiling over or bumping of the solution prevented, based on the procedure?
A.
using a longer condenser
B.
adding more water
C.
using boiling chips
D.
using finely grounded sample
3. 
What does a turbid or milky distillate indicate?
A.
the distillate is highly volatile
B.
the distillate is a pure oil
C.
the distillate does not contain any oil
D.
the oil is mixed with water (emulsion)
4. 
Why does eugenol yield a positive result with ferric chloride test?
A.
it contains allyl group
B.
it contains phenol
C.
it has an ester group
D.
it has an ether group
5. 
Which of the following is not a medical use of eugenol?
A.
cardioprotective
B.
topical antiseptic
C.
treatment of toothache
D.
counterirritant