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Chem Practicals > FUNCTIONAL GROUPS > Flashcards

FUNCTIONAL GROUPS Flashcards

(24 cards)

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1
Q

Sodium Hydrogen Carbonate

A

benzoic acid, brisk effervescence of carbon dioxide

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2
Q

Ethanol, Conc H2SO4

A

benzoic acid, fruity smell of ethyl benzoate

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3
Q

Neutral ferric chloride, NH4OH

A

benzoic acid, buff colouration

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4
Q

sodium bisulphite

A

acetone, white crystalline ppt

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5
Q

iodine, sodium hydroxide

A

acetone, yellow crystals of iodoform

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6
Q

sodium nitroprusside, NaOH

A

acetone, wine red colouration that disappears on heating

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7
Q

mercuric chloride, NaOH

A

acetone, white ppt which dissolves in NaOH

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8
Q

bromine water

A

aniline, white/pink ppt of tribromoaniline

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9
Q

bleaching powder solution, ammonium sulphide

A

aniline, purple/violet colour which turns red due to ammonium sulphide

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10
Q

sodium hypochlorite

A

aniline, purple colouration

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11
Q

Ferric chloride, conc HCl

A

aniline, white ppt of aniline hydrochloride which turns pale green

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12
Q

potassium dichromate, dil H2SO4

A

aniline, green/blue colouration which turns black

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13
Q

alkaline β-naphthol, 10% sodium nitrite, conc HCl

A

aniline, red-orange dye

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14
Q

Fehling’s solution

A

formaldehyde, red ppt of cuprous oxide

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15
Q

Tollen’s reagent

A

formaldehyde, silver mirror formed on inner walls

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16
Q

Schiff’s reagent, conc HCl

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A

formaldehyde, pink colouration which turns violet when acid is added

17
Q

pyrogallol, conc HCl

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A

formaldehyde, pink/purple ppt

18
Q

Resorcinol, conc H2SO4

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A

formaldehyde, red ring at the junction of the two liquids

19
Q

potassium hydrogen sulphate

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A

glycerol, pungent irritating vapours of acrolein

20
Q

ceric ammonium nitrate

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A

glycerol, red colouration

21
Q

borax, phenolphthalein

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A

glycerol, pink colour of phenolphthalein disappears on adding glycerol. Appears on heating and disappears on cooling.

22
Q

phenol, conc H2SO4, NH4OH

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A

glycerol, red colouration on adding NH4OH

23
Q

copper sulphate, NaOH

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A

glycerol, blue colouration on adding NaOH

24
Q

pyrogallol solution, ethanol, conc H2SO4

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A

glycerol, red colouration

Chem Practicals (2 decks)

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