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問題一覧
1
The test that make oil and water mixed.
Emulsification Test
2
In which solvent are the lipids completely insoluble?
distilled water
3
The Grease Spot test is specific for what kind of lipids?
lipids with fatty acids
4
What is the best solvent for lecithin?
ether
5
In which solvent will coconut oil form a temporary emulsion?
water
6
Which gives a positive result to the Grease Spot test?
lecithin solution
7
Emulsification is a chemical change occurring among lipids.
False
8
Which lipid sample has the greatest amount of saturated fatty acid?
butter
9
What test is specific for bile acids and lecithin?
emulsification test
10
Lipids are soluble in non-polar organic solvents.
True
11
The relative amount of carbon, hydrogen, oxygen, nitrogen and phosphorus and the structural position of these elements in lipids determine the degree of solubility of lipids in different solvents.
True
12
Which does not affect the solubility of lipids?
pH of the lipids
13
Why didn't acetone give a positive result in the Grease Spot Test?
it does not contain fatty acids
14
What test is specific for lecithin solution and coconut oil?
grease spot test
15
Emulsification Test is a test for the chemical property of lipids.
False
16
The longer the hydrocarbon chain of lipids, the more insoluble it is in polar solvents.
True
17
Solvents with very low pH can dissolve lipids.
True
18
What lipids is contained in the digestive fluid of the liver that helps in the digestion of fats?
bile acids
19
Which is not true about lecithin?
has low boiling point
20
As an emulsifying agent, the non-polar portion of lipids is being attracted to the non-polar molecules in a solution while the polar hydrocarbon portion is attracted to the polar water molecules in the solution.
False