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BIOMOLECULES LAB > Qualitative Analysis of Oils and Fats > Flashcards

Qualitative Analysis of Oils and Fats Flashcards

1
Q

How many calories comes from fats?

A

20-35% of calories

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2
Q

are triesters of glycerol and higher fatty acids

A

FATS AND OILS

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3
Q

one type of clear butter used in South Asian cookin

A

GHEE

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4
Q

animal ghee

A

DESI GHEE

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5
Q

vegetable ghee

A

VANASPATI GHEE

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6
Q

TRUE OR FALSE:

Fats are solids while oils are liquids at ordinary temperature.

A

TRUE

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7
Q

TRUE OR FALSE:

Fats and oils are a mixture of triglycerides.

A

TRUE

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8
Q

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

A

TRIGLYCERIDES

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9
Q

are long chain hydrocarbons with carboxyl groups (COOH groups)

A

FATTY ACIDS

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10
Q

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

A

SATURATED FATTY ACIDS

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11
Q

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

A

UNSATURATED FATTY ACIDS

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12
Q

associated with health problems and cardiovascular diseases

A

TRANS FATTY ACIDS

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13
Q

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

A

CIS FORM

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14
Q

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

A

HYDROGENATION

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15
Q

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

A

OXYGEN OR HALOGEN

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16
Q

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

A

IODINE NUMBER

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17
Q

TRUE OR FALSE

A higher iodine value indicates a higher degree of unsaturation.

A

TRUE

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18
Q

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

A

COLOR CHANGE

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19
Q

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

A

SOLUBILITY TEST

20
Q

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

A

SOLUBILITY TEST

21
Q

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.

A

LIPIDS

22
Q

TRUE OR FALSE

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

A

TRUE

23
Q

TRUE OR FALSE

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

A

FALSE

24
Q

TRUE OR FALSE

Lipids are soluble in polar solvent like water.

A

FALSE

25
Q

TRUE OR FALSE

Lipids are insoluble in a polar solvent like water.

A

TRUE

26
Q

TRUE OR FALSE

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

A

TRUE

27
Q

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

A

TRANSLUSCENT SPOT TEST

28
Q

What is the principle of the Transcluscent spot test?

A

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

29
Q

TRUE OR FALSE

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

A

TRUE

30
Q

TRUE OR FALSE

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

A

TRUE

31
Q

used to detect the presence of glycerol or fat

A

ACROLEIN TEST

32
Q

What is the dehydrating agent in the acrolein test?

A

potassium bisulphate (KHSO4)

33
Q

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

A

GLYCEROL PORTION

34
Q

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

A

ACROLEIN

35
Q

TRUE OR FALSE

Potassium bisulfate is both a strong acid, and strong dehydrating reagent.

A

TRUE

36
Q

It has a characteristic sharp irritating odor.

A

acrolein

37
Q

used to detect the presence of sesame oil

A

BAUDOUIN TEST

38
Q

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

A

ROSE RED COLOR

39
Q

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

A

HUBLE’S TEST

40
Q

TRUE OR FALSE:

During the Huble’s test reaction, the violet colour of iodine fades away if the oil or fat is unsaturated.

A

TRUE

41
Q

TRUE OR FALSE:

During the Huble’s test reaction, the violet colour of iodine fades away if the oil or fat is saturated.

A

FALSE

42
Q

TRUE OR FALSE:

In Huble’s test, if the oil or fat is unsaturated, the violet colour of iodine persists.

A

FALSE

43
Q

TRUE OR FALSE:

Saturated fatty acids will not give the halogenation reaction.

A

TRUE

44
Q

TRUE OR FALSE:

Saturated fatty acids will give the halogenation reaction.

A

FALSE

45
Q

TRUE OR FALSE

Saturated fats are of animal origin and are usually present in solid form

A

TRUE

46
Q

TRUE OR FALSE

Unaturated fats are of animal origin and are usually present in solid form

A

FALSE

47
Q

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

A

TRUE

BIOMOLECULES LAB (6 decks)

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