REACTION OF LIPIDS (Activity 5)

Question 1

Fats and oils are the most abundant lipids found in nature.

Answer 1

TRUE

Question 2

Fats contain higher percentage of ____ fatty acid while

oils have more of the ____ fatty acids.

Answer 2

saturated, unsaturated

Question 3

Fats and oils are ____ mixtures

Answer 3

triacylglycerol

Question 4

The chemical properties of triacylglycerol are typical with that of

Answer 4

esters and

alkanes.

Question 5

Hydrolysis may occur making them acidic giving rise to volatile fatty acid
which undergoes ____ to give foul odor of volatile aldehydes and ketones..

Answer 5

oxidation

Question 6

Types of rancidity

Answer 6

oxidative rancidity and hydrolytic rancidity

Question 7

Arcolein is a test for

Answer 7

presence of glycerol or fat

Question 8

Breaking down of large fat lipids globules into smaller globules, mainly accomplished by bile acids that is formed in small intestine

Answer 8

Emulsification

Question 9

Oxidation and hydrolysis of fats and oils when exposed to air light and moisture resulting in unpleasant smell

Answer 9

Rancidity

Question 10

Formation of reddish-brown solution at interface

Answer 10

Salkowski

Question 11

Test for detection of cholesterol and sterols

Answer 11

Salkowski

Question 12

Test for chemical estimation and detection of cholesterol

Answer 12

Liebermann-Burchard

Question 13

Formation of emerald or dark green color solution

Answer 13

Liebermann-Burchard

Question 14

Phenolphthalein gives off a ___ to an acid solution

Answer 14

colorless solution

Question 15

Phenolphthalein gives off a ___ to base solution

Answer 15

pink color solution

Question 16

Reaction of methyl orange to an acid solution

Answer 16

pink color

Question 17

Reaction of methyl orange to a base solution

Answer 17

light yellow solution

Question 18

solution remains colorless, no emulsion formed

Answer 18

negative, lipids are not present

Question 19

cloudy white suspension forms at the top of the solution (tiny globules)

Answer 19

positive, lipids are present

Question 20

alkaline ph methyl orange indicator

Answer 20

yellow

Question 21

neutral ph methyl orange indicator

Answer 21

yellow

Question 22

acidic ph methyl orange indicator

Answer 22

red-orange

Question 23

red and blue remained same

Answer 23

randicity, neutral

Question 24

red turns blue, blue remained same

Answer 24

randicity, base

Question 25

red remained same, blue turns red

Answer 25

randicity, acid