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chemistry > Aldehydes and Ketones > Flashcards

Aldehydes and Ketones Flashcards

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1
Q

Formalin composition

A

40% formaldehyde 8% methanol 52% water

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2
Q

Catalyst used in lab preparation of formaldehyde/formalin

A

Platinised asbestos or copper or silver catalyst

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3
Q

Temperature in lab preparation of formalin

A

300C

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4
Q

Reactants in lab preparation of formalin

A

methanol & O2

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5
Q

Catalyst used in industrial preparation of formaldehyde/formalin

A

FeO Mo2O3 silver catalyst

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6
Q

Industrial catalyst of acetaldehyde preparation

A

PdCl2 +CuCl2 [cupric chloride] water

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7
Q

Preparation of Acetone

A

Dry distillation of calcium acetate

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8
Q

higher mp and bp compared to

A

alkanes

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9
Q

lower mp and bp compared to

A

alcohol

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10
Q

solubility

A

More soluble than alkanes but less than alcohols

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11
Q

sp2 hybridization

A

carbonyl carbon

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12
Q

catalyst used in ozonide reduction

A

Zn/H2O

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13
Q

catalyst in hydration of alkynes

A

HgSO4 and H2SO4

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14
Q

hydration if alkynes results in the formation of intermediate

A

vinyl alcohol(ethenol)

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15
Q

Oxygen atom in carbonyl acts as

A

nucleophile

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16
Q

carbon atom in carbonyl acts as

A

electrophile

17
Q

maximum reactivity in nucleophilic substitution reaction

A

Formaldehyde

18
Q

In Fehling’s reagent red colour is due to

A

Cuprous oxide Cu2O

19
Q

Enolate ion

A

check google

20
Q

maximum stearic hindrance when

A

when larger alkyl group is attached to carbonyl carbon

21
Q

Reactivity order

A

HCHO>RCHO>RCRO

22
Q

Addition of sodium Bisulfate

A

White ppt

23
Q

Bisulfite regenerates parent ketone

A

on heating with dilute mineral acid

24
Q

two molecules of an aldehyde are reacted to produce a primary alcohol and a carboxylic acid

A

Cannizzaro reaction

25
Q

Polymerization catalyst

A

dilute sulphuric acid

26
Q

Polymerization of formaldehyde

A

metaformaldehyde

27
Q

polymerization of acetaldehyde

A

paraldehyde

28
Q

Reaction with hydrazines to form

A

hydrazones

29
Q

Reaction with hydroxylamine to form

A

oximes

30
Q

Addition of alcohols with aldehydes with HCl gas

A

acetals

31
Q

Clemmensen reaction (acidic)

A

Zn or Hg in hcl reduces the carbonyl to CH2

32
Q

Wolff-Kishner reduction (basic)

A

NH2NH2/ KOH /ethylene glycol reduces carbonyl to CH2

33
Q

Catalytic reduction

A

Alcohol formed

34
Q

Catalytic reduction catalysts

A

Pt Pd Ni

35
Q

Fehlings test

A

Cupric tartarate

36
Q

Benedicts test

A

cupric citrate

37
Q

urotropine is mad efrom which aldehyde

A

formaldehyde

38
Q

Phenolic resins and synthetic drugs

A

acetaldehyde

chemistry (4 decks)

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