Qualitative Analysis of Oils and Fats

Question 1

How many calories comes from fats?

Answer 1

20-35% of calories

Question 2

are triesters of glycerol and higher fatty acids

Answer 2

FATS AND OILS

Question 3

one type of clear butter used in South Asian cookin

Answer 3

GHEE

Question 4

animal ghee

Answer 4

DESI GHEE

Question 5

vegetable ghee

Answer 5

VANASPATI GHEE

Question 6

TRUE OR FALSE:

Fats are solids while oils are liquids at ordinary temperature.

Answer 6

TRUE

Question 7

TRUE OR FALSE:

Fats and oils are a mixture of triglycerides.

Answer 7

TRUE

Question 8

made up of three fatty acids linked to glycerol by fatty acyl esters

Answer 8

TRIGLYCERIDES

Question 9

are long chain hydrocarbons with carboxyl groups (COOH groups)

Answer 9

FATTY ACIDS

Question 10

contain only single bond between the carbon atoms and tend to be solids at room temperature

Answer 10

SATURATED FATTY ACIDS

Question 11

contain double bonds between the carbon atom in addition to the single bonds present in the fatty acid chain. They are likely to exists as liquids at room temperature

Answer 11

UNSATURATED FATTY ACIDS

Question 12

associated with health problems and cardiovascular diseases

Answer 12

TRANS FATTY ACIDS

Question 13

The double bonds present in the naturally occurring unsaturated fats are in the

Answer 13

CIS FORM

Question 14

Unsaturated fatty acids can be converted into saturated by the process of

Answer 14

HYDROGENATION

Question 15

Depending upon the degree of unsaturation, the fatty acids can combine with ____________________________________———————————————————–to form saturated fatty acids.

Answer 15

OXYGEN OR HALOGEN

Question 16

the number of grams of iodine consumed by 100g of fat

Answer 16

IODINE NUMBER

Question 17

TRUE OR FALSE

A higher iodine value indicates a higher degree of unsaturation.

Answer 17

TRUE

Question 18

The presence of lipids in the qualitative analysis is measured by the

Answer 18

COLOR CHANGE

Question 19

This test detects the solubility of lipid in various solvents to check whether it is miscible or immiscible in polar or non-polar solvents.

Answer 19

SOLUBILITY TEST

Question 20

based on the property of lipid to dissolve in different solvents.

Answer 20

SOLUBILITY TEST

Question 21

are readily miscible in non-polar solvents like chloroform, partially soluble in a polar solvent like ethanol and immiscible in a polar solvent like water.

Answer 21

LIPIDS

Question 22

TRUE OR FALSE

**Lipids are soluble in non-polar solvent i.e. chloroform and partially soluble in ethanol which can solubilize upon heating. **

Answer 22

TRUE

Question 23

TRUE OR FALSE

**Lipids are insoluble in non-polar solvent i.e. chloroform and partially soluble in ethanol which can solubilize upon heating. **

Answer 23

FALSE

Question 24

TRUE OR FALSE

Lipids are soluble in polar solvent like water.

Answer 24

FALSE

Question 25

# TRUE OR FALSE Lipids are insoluble in a polar solvent like water.

Answer 25

**TRUE**

Question 26

# TRUE OR FALSE Oils and fats are soluble in organic solvents like, chloroform, alcohol etc. but are insoluble in water.

Answer 26

**TRUE**

Question 27

test for the lipids which can be detected by the appearance of a translucent and greasy spot.

Answer 27

TRANSLUSCENT SPOT TEST

Question 28

What is the principle of the Transcluscent spot test?

Answer 28

The lipid will form a greasy spot as they are having a greasy texture that will penetrate into the filter paper.

Question 29

# TRUE OR FALSE Fats and oils have higher boiling points so at room temperature they cannot absorb enough heat to evaporate.

Answer 29

**TRUE**

Question 30

# TRUE OR FALSE When fat or oil is place on a sheet of paper, it diffracts light, which becomes the TRANSLUSCENT SPOT.

Answer 30

**TRUE**

Question 31

used to detect the presence of glycerol or fat

Answer 31

ACROLEIN TEST

Question 32

What is the dehydrating agent in the acrolein test?

Answer 32

potassium bisulphate (KHSO4)

Question 33

It is the portion of the potassium bisulfate that is dehydrated to form an an unsaturated aldehyde

Answer 33

GLYCEROL PORTION

Question 34

the glycerol portion of the molecule is dehydrated to form an unsaturated aldehyde called

Answer 34

ACROLEIN

Question 35

# TRUE OR FALSE Potassium bisulfate is both a strong acid, and strong dehydrating reagent.

Answer 35

TRUE

Question 36

It has a characteristic sharp irritating odor.

Answer 36

acrolein

Question 37

used to detect the presence of sesame oil

Answer 37

BAUDOUIN TEST

Question 38

Sesame oil gives a characteristic _____________________________---------------------------------with concentrated hydrochloric acid and furfural solution

Answer 38

ROSE RED COLOR

Question 39

used to detect the degree of unsaturation in oil or fat.

Answer 39

HUBLE'S TEST

Question 40

# TRUE OR FALSE: During the Huble's test reaction, the violet colour of iodine **fades away** if the oil or fat is **unsaturated**.

Answer 40

TRUE

Question 41

# TRUE OR FALSE: During the Huble's test reaction, the violet colour of iodine **fades away** if the oil or fat is **saturated**.

Answer 41

FALSE

Question 42

# TRUE OR FALSE: In Huble's test, if the oil or fat is **unsaturated**, the violet colour of iodine persists.

Answer 42

FALSE

Question 43

# TRUE OR FALSE: Saturated fatty acids will not give the halogenation reaction.

Answer 43

TRUE

Question 44

# TRUE OR FALSE: Saturated fatty acids will give the halogenation reaction.

Answer 44

FALSE

Question 45

# TRUE OR FALSE Saturated fats are of animal origin and are usually present in solid form

Answer 45

TRUE

Question 46

# TRUE OR FALSE Unaturated fats are of animal origin and are usually present in solid form

Answer 46

FALSE

Question 47

Unsaturated fat is found in fish like salmon and tuna, nuts, seeds etc.

Answer 47

TRUE