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OrgChem (FINALS) > Alcohols (LAB) > Flashcards

Alcohols (LAB) Flashcards

1
Q

What is the functional group of alcohol?

A

R-OH

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2
Q

This is toxic and is known as wood alcohol

A

Methanol

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3
Q

What is the formula of methanol?

A

CH3OH

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4
Q

It burns with blue flame and forms CO2 and water

A

Methanol

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5
Q

When methanol is oxidised, it forms:

A

HCHO, or formaldehyde

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6
Q

What are the uses of methanol?

A

Solvent for shellac, denaturant for ethanol

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7
Q

What is the color of KMnO4, or potassium permanganate?

A

Violet/Purple

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8
Q

What is the color of K2Cr2O7 or potassium dichromate?

A

Yellowish orange

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9
Q

A clear colorless liquid and an ingredient in alcolic beverages

A

Ethanol

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10
Q

Also called grain alcohol

A

Ethanol

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11
Q

Ethanol formula

A

CH3CH2OH

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12
Q

It is less toxic than methanol or ethanol; clear, colorless, bitter liquid

A

Isopropyl alcohol

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13
Q

Also known as rubbing alcohol

A

Isopropyl alcohol

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14
Q

alcohol with less than 1% water

A

Absolute alcohol

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15
Q

alcohol products adulterated with toxic and/or bad tasting additives (methanol, benzene, pyridine, castor oil, gasoline, isopropyl alcohol, and acetone), making it unsuitable for human consumption

A

Denatured alcohol

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16
Q

True or false: As the length of the hydrocarbon chain increases, the solubility in water decreases

17
Q

Which is more soluble: Ethanol or Isopropyl Alcohol

18
Q

Which is more soluble: tert-butyl alcohol or n-butyl alcohol

A

Tert-butyl alcohol

19
Q

Arrange the ff in decreasing solubility in water:
A - CH3OH
B - N-butyl alcohol
C - CH3CH2OH
D - Isopropyl alcohol
E - Sec-butyl alcohol
F - Tert-butyl alcohol

A

A, C, F, E, D, B

20
Q

Lucas reagent formula:

A

HCl + ZnCl2

21
Q

Ethanol with lucas reagent reaction:

A

No reaction

22
Q

Sec-butyl alcohol with lucas reagent reaction:

A

Cloudiness within 5min, sec-butyl chloride

23
Q

Tert-butyl alcohol with lucas reagent reaction:

A

Immediate cloudiness

24
Q

Primary alcohol when oxidised turns to:

A

Aldehyde, green color

25
Q

Secondary alcohol when oxidised turns to:

A

Ketone, green color

26
Q

Tertiary alcohol when oxidised turns to:

A

No reaction, yellow color remains

27
Q

Esterification of ethanol result:

A

Ethylacetate, plastic balloon odor

28
Q

Esterification of salicylic acid:

A

Methyl acetate, Oil of Wintergreen – Efficascent oil

29
Q

The formula of iodoform:

30
Q

What is the regeant used in iodoform test?

31
Q

What is the positive result for iodoform test?

A

Yellow precipitate

32
Q

True or false: Tertiary alcohols give positive results in iodoform test

A

False, it does not give (+)

33
Q

This test can distinguish ethanol from methanol

A

Iodoform test

OrgChem (FINALS) (4 decks)

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